Document:

<PAGE>

                                                                    Exhibit 10.8

                       ADDENDUM TO THE NETCENTIVES INC.
                     INCENTIVE MANAGEMENT PROGRAM AGREEMENT

This Addendum (the "Addendum") to the Netcentives Inc. Incentives Management
Program Agreement dated as of March 31, 2000 (the "Agreement") between
coolsavings.com inc., a Michigan corporation ("CoolSavings") and Netcentives
Inc., a Delaware corporation ("Netcentives") is effective as of June 14, 2001
(the "Addendum Effective Date"), subject to the condition set forth in Paragraph
10 of this Addendum.

WHEREAS, pursuant to the Agreement, Netcentives is licensing certain technology
and providing certain services to CoolSavings;

WHEREAS, CoolSavings has requested to alter its payment obligations under the
Agreement and Netcentives is willing to so alter pursuant to the terms of this
Addendum.

NOW, THEREFORE, the parties hereby agree, for good and valuable consideration to
this Addendum to the Agreement as provided below (all capitalized terms not
otherwise defined herein have the meanings ascribed to them in the Agreement):

    1.  The initial sentence of Section 3.11(C) of the Agreement is hereby
        amended in its entirety and replaced as follows:

        As part of its ongoing operation of the CoolSavings Program, Netcentives
        will update the web pages it hosts in connection with the operation of
        the CoolSavings Program, not less than once per month for content
        releases and not less than once every two weeks for Rewards no longer
        offered by suppliers; provided, however, that in the first Quarter
        following the Launch Date, such web pages may be updated more frequently
        as mutually agreed by the parties.

    2.  A new Section 3.14 is hereby added to the Agreement as follows:

        3.14  RPV Account. The amount equal to the total RPV paid to Netcentives
        pursuant to Section 4.4(A), less offsets for Rewards and any agreed upon
        Breakage shall be the "RPV Account". Rewards shall be supplied from such
        RPV Account. CoolSavings shall be liable for all Rewards in excess of
        the RPV Account.

    3.  A new Section 3.15 is hereby added to the Agreement as follows:

        3.15  Account Management. Each party shall name one representative to be
        the Account Manager during the Term ("Account Manager"). For
        Netcentives, the Account Manager is David Miller. For CoolSavings, the
        Account Manager is Chris Mettler. Either party may replace its Account
        Manager at any time upon reasonable advance notice to the other;
        provided, however, that if a party is dissatisfied in any way with such
        a replacement, the parties will work in good faith to communicate and
        resolve such dissatisfaction. The Account Managers shall meet from time
        to time as agreed by the Account Managers but not less than once every
        three months (quarterly). Such meetings may be conducted in person or by
        telephone. The Account Managers shall be responsible for understanding
        the full scope of the relationship. The Account Managers shall also be
        responsible for engaging the appropriate representatives of the
        respective companies
<PAGE>

        to allow the parties to meet their obligations hereunder. In addition,
        the Account Managers shall review and approve CoolSavings' quarterly
        marketing plan for the CoolSavings Program and shall negotiate in good
        faith whether joint activities should be explored in order to better
        promote the CoolSavings Program. The Account Managers shall cooperate to
        exchange information regarding Promotions, including but not limited to
        click thru percentages, purchase rates and amounts, and margins in
        aggregate as well as by segment and individual member. The Account
        Managers will act as an initial point of contact to resolve
        expeditiously any conflict between the parties related to this
        Agreement. Notwithstanding the foregoing, in no event shall either party
        be required to exchange information that violates its privacy policy, as
        the same is amended from time to time.

    4.  Section 4.4(A) of the Agreement is hereby supplemented by adding the
        following to the end of the paragraph:

                Notwithstanding the foregoing, commencing on June 14, 2001 (the
                "Price Adjustment Date"), the Mark-Up shall increase to forty-
                three percent (43%) of the RPV and the Price shall be amended to
                be such Mark-Up only. By way of example only, prior to the Price
                Adjustment Date, in order to have 1,000 Points Minted,
                CoolSavings would pay Netcentives $12.60 (RPV of $0.01 plus 26%
                Mark-Up); after the Price Adjustment Date, in order to have
                1,000 Points Minted, CoolSavings would pay Netcentives $4.30
                (43% Mark-Up only).

    5.  The parties agree and acknowledge that as of the Price Adjustment Date,
        the RPV Account balance is $996,316.73 (99,631,673 Points outstanding).
        At all times, CoolSavings hereby agrees to maintain a minimum account
        balance in the RPV Account equal to at least 40% of the RPV for Points
        then outstanding (the "Minimum RPV Amount"). The parties agree and
        acknowledge that as of the Price Adjustment Date, the Minimum RPV
        Account balance is $398,526.69. In the event the RPV Account balance is
        less than the Minimum RPV Amount, Netcentives may, in its sole
        discretion, deliver written notice (the "Wind-Down Notice") to
        CoolSavings that it is in material breach of the Agreement, and, unless
        cured within 10 calendar days, Netcentives may immediately terminate the
        Agreement and commence a wind-down (the "Mandatory Wind-Down") of the
        CoolSavings Program pursuant to the terms of Section 5.5 of the
        Agreement (except that it shall not be at CoolSavings' option).
        Notwithstanding the foregoing, in the event CoolSavings did not have
        notice that the RPV Account balance is less than the Minimum RPV Amount
        because reports produced by the Incentives Management System were
        unavailable due to a technical failure caused by Netcentives, then the
        10 calendar day cure period shall be equitably tolled for the equivalent
        of the period of such unavailability; provided however, CoolSavings
        shall provide prompt written notice of such technical failure as soon as
        it becomes aware of the same. In the event the equitable tolling
        continues for 30 days, the parties shall immediately cooperate to
        determine the proper amounts owed to cure the default and thereafter the
        cure period shall commence. In the event of a Mandatory Wind-Down, the
        RPV Account shall be netted against Netcentives' applicable fees as set
        forth in Section 5.5 of the Agreement and such amount shall be deemed
        paid to Netcentives and shall be retained by Netcentives. Any cure of
        the obligation set forth in this paragraph 5 shall require a funding of
        the RPV Account that is
<PAGE>

        sufficient to maintain the RPV Account for 2 months of forecasted
        Rewards, as determined by Netcentives in its reasonable discretion. By
        way of example only, in the event that 200,000,000 Points are
        outstanding as of December 31, 2001, then the RPV for Points then
        outstanding would be $2,000,000, 40% of which is $800,000. Therefore,
        CoolSavings would be obligated to fund the RPV Account to the $800,000
        level, plus an amount equal to 2 months of forecasted Rewards, as
        determined by Netcentives in its reasonable discretion.

    6.  Section 4.5(B) of the Agreement is hereby amended in its entirety and
        replaced as follows:

                During the second Contract Year, CoolSavings will purchase
                134,873,016 Points. The Guaranteed Purchase commitment for the
                second Contract Year shall be made as follows: (i) $10,000 shall
                be due on the Price Adjustment Date; (ii) $90,000 shall be due
                on June 25, 2001; and (iii) the balance of $489,954 shall be due
                in monthly installments thereafter ($53,328.22) commencing July
                25, 2001, until paid in full. The foregoing Guaranteed Purchase
                is subject to acceleration due to a higher consumption rate in
                accordance with Section 4.6(B). Payments shall be made by wire
                transfer to an account designated by Netcentives.

    7.  Section 4.7 of the Agreement is hereby amended to provide that
        CoolSavings will retain 100% of Breakage. In lieu of the Breakage set
        forth in Section 4.7 of the Agreement to be retained by Netcentives,
        immediately, upon execution of this Addendum, $199,074.48 of the RPV
        Account balance, shall be removed from the RPV Account and retained by
        Netcentives as in lieu of Breakage under the Agreement. Netcentives
        shall pay CoolSavings any outstanding Breakage upon expiration of the
        Agreement or termination by CoolSavings pursuant to the terms of the
        Agreement (the "Breakage Remittance"), provided that any amounts owing
        Netcentives pursuant to the Agreement and this Addendum as of such
        expiration or termination shall first be deducted from such Breakage.
        The Breakage Remittance shall be made in equal quarterly installments
        commencing 3 months from the effective date of the termination or
        expiration. The effective date of the termination or expiration shall be
        tolled during the pendancy of any Extended Service Period, Final
        Promotions Period, or other wind-down of the CoolSavings Program for
        purposes of determining the payments of the Breakage Remittance. For
        purposes of clarity, there shall be no Breakage Remittance or other
        payments to CoolSavings by Netcentives in the event of a transfer to a
        new program as provided in Section 5.6(B) of the Agreement, except for:
        (i) Refunds owing pursuant to Section 4.4(B) of the Agreement, and (ii)
        RPV upon redemption of Flagged Points pursuant to Section 5.6(C)(iii) of
        the Agreement.

    8.  The parties agree to cooperate to facilitate understanding of accounting
        treatment of the CoolSavings Program, including Netcentives arranging
        for CoolSavings to consult with its independent auditor regarding the
        same. However, any expenses incurred as a result of this process will be
        borne solely by CoolSavings.

    9.  In the event (a) CoolSavings files a petition in bankruptcy under
        Article 7 of the Bankruptcy Code or (b) Netcentives terminates the
        Agreement pursuant to Section 5.2(A)(i) of the Agreement, then this
        Addendum shall be deemed void ab initio and the Agreement in effect
        prior to this Addendum shall govern all aspects of the parties'
        relationship; provided however, that for the purposes of this Paragraph
        9only, the cure period set forth in Section 5.2(A)(i) of the
<PAGE>

        Agreement shall be deemed to be sixty (60) days in the first instance of
        a breach by CoolSavings and thirty (30) days for any breach by
        CoolSavings thereafter. Upon fulfillment of the obligations set forth in
        this Addendum, this provision shall be of no further effect.

    10. Notwithstanding anything in this Addendum to the contrary, the parties
        agree that this Addendum shall not become effective until Netcentives
        receives the payments set forth in Paragraph 6 (i) and 6 (ii) of this
        Addendum, provided that both such payments are received on or prior to
        June 30, 2001. Once such payments are received on or prior to June 30,
        2001, this Addendum shall be deemed to be effective as of the Addendum
        Effective Date.

    11. The parties agree and acknowledge that, except for payments owing to
        Netcentives, the conduct of the CoolSavings Program and the obligations
        of each of the parties under the Agreement, are in compliance with the
        Agreement and there is no current basis for termination of the
        Agreement.

    12. This Addendum shall not be act as a waiver that any party has at law or
        equity with respects to its rights, power or remedies pursuant to the
        Agreement.

    13. Upon execution of this Addendum, the parties agree to immediately
        commence negotiations in good faith regarding a Service Level Agreement
        to be attached hereto as Exhibit O. The parties agree that the Service
        Level Agreement is a material part of this Addendum, and shall be agreed
        to by July 15, 2001; provided, however, failure to so agree to the
        Service Level Agreement shall not be grounds for terminating the
        Agreement.

Except to the extent the Agreement is supplemented and modified herein, the
Agreement remains in full force and effect.

AGREED AND ACCEPTED BY:

________________________________                 _______________________________
coolsavings.com inc.                             Netcentives Inc.

________________________________                 _______________________________
Title                                            Title

________________________________                 _______________________________
Date                                             Date<PAGE>
                                                                    Exhibit 10.9

June 14, 2001

Coolsavings.com inc.
360 North Michigan Avenue
Suite 1800
Chicago, Illinois  60601
Attention: Steve Golden

Dear Steve:

     We are writing this letter to you in reference to that certain Lease
Agreement dated January 3, 2000 (the "Original Lease"), as amended by that
certain First Amendment to Lease dated as of March 31, 2000 (the "First
Amendment"), and as further amended by that certain Second Amendment to Lease
dated as of November 30, 2000 (the "Second Amendment") (the Original Lease, as
amended by the First Amendment and the Second Amendment, is hereinafter referred
to as the "Lease"), between coolsavings.com inc, as tenant ("Tenant"), and 360
North Michigan Trust, a Delaware business trust, as landlord ("Landlord"), for
certain premises comprising approximately 62,408 square feet on the 8th, 11th,
12th, 13th, 14th, 16th, 18th, 19th, 20th and 21st floors of the building
commonly known as 360 North Michigan Avenue, Chicago, Illinois (the "Premises").

     All capitalized terms and phrases, unless defined in this letter agreement
(the "Agreement"), shall have the specific meanings as are set forth in the
Lease.

     Tenant acknowledges that as of the date of this Agreement several defaults
by Tenant have occurred under the Lease and are continuing, which include the
following: (a) the failure by Tenant to pay to Landlord the Rent due under the
Lease as of May 1, 2001; (b) the failure by Tenant to deliver to Landlord an
irrevocable, standby letter of credit in the amount of $231,552.00 as required
under the terms of the First Amendment; (c) the delivery by Tenant to Landlord
of an irrevocable, standby letter of credit bearing reference number 60751358
improperly reducing the face amount during the term of the Lease; (d) the
failure by Tenant to deliver to Landlord a replacement letter of credit for the
irrevocable, standby letter of credit bearing reference number 60751398 in the
amount of $750,000.00; and (e) the failure by Tenant to pay to or deposit with
Landlord certain monies relating to tenant improvements for the Premises owed to
(i) Interior Alterations, Inc., the contractor retained by Landlord ("IAI"),
(ii) Gregg & Associates, the engineer retained by Tenant ("Gregg"), (iii)
Partners by Design, the architect retained by Tenant ("Partners"), (iv)
Commercial Light Company, a subcontractor retained by Tenant ("CLC"), and (v)
Advent Systems, Inc., a subcontractor retained by Tenant ("Advent")
(individually a "Default" and collectively the "Defaults"). For purposes of this
Agreement, during the "Forbearance Period" (as defined below) only, Tenant's
future failure to pay any Rent in accordance with the terms of the Lease shall
be deemed to be a "Default" as defined in the immediately preceding sentence.
<PAGE>

Mr. Steve Golden
June 14, 2001
Page -2-

     Tenant has requested that Landlord forbear exercising its rights and
remedies under the Lease or at law or equity with respect to the Defaults.

     Landlord agrees to forbear from exercising its rights under the Lease with
respect to the Defaults until the earlier to occur of (a) the date Tenant has
cured all of the Defaults; and (b) the occurrence of any "Forbearance Event of
Default" (as defined below) (the "Forbearance Period"), subject to the
satisfaction of the following conditions:

     (1)  Tenant must pay to Landlord, on or before June 30, 2001 and continuing
          on or before the last day of each successive calendar month during the
          Forbearance Period, the full amount of the Rent due under the Lease
          for the month of June, 2001 and for each successive calendar month
          thereafter, together with any applicable late charges due under the
          Lease.

     (2)  Tenant must deliver to Landlord, on or before June 30, 2001, an
          irrevocable, standby letter of credit in the amount of $100,000.00 as
          required under the terms of the First Amendment.

     (3)  Tenant must deliver to Landlord, on or before September 30, 2001, an
          additional, irrevocable, standby letter of credit in the amount of
          $131,552.00 as required under the terms of the First Amendment.

     (4)  Tenant must deliver to Landlord, on or before June 20, 2001, an
          amendment to or replacement of that certain irrevocable, standby
          letter of credit bearing reference number 60751358 in the current
          amount of $703,171.00 maintaining the applicable face amounts as
          required under the terms of the Lease, and terminating on December 31,
          2002. Any subsequent amendment, renewal or replacement of said letter
          of credit must be delivered to Landlord not less than thirty (30) days
          prior to the expiration date of said letter of credit. Upon written
          request therefor, Landlord shall promptly execute and deliver all
          documents reasonably requested by the issuing bank relating to
          amending the letter of credit as set forth herein.

     (5)  Tenant must deliver to Landlord, on or before June 20, 2001, an
          amendment to or replacement of that certain irrevocable, standby
          letter of credit bearing reference number 60751398 in the amount of
          $750,000.00 maintaining the applicable face amounts as required under
          the terms of the Lease, and terminating on December 31, 2002. Any
          subsequent amendment, renewal or replacement of said letter of credit
          must be delivered to Landlord not less than thirty (30) days prior to
          the expiration date of said letter of credit. Upon written request
          therefor, Landlord shall promptly
<PAGE>

Mr. Steve Golden
June 14, 2001
Page -3-

          execute and deliver all documents reasonably requested by the issuing
          bank relating to amending the letter of credit as set forth herein.

     (6)  Tenant must pay the sum of $331,473.15 to IAI for tenant improvements
          relating to the Premises, which amount will be paid in accordance with
          any payment plan or amendment thereto entered into by Tenant and IAI.
          Tenant will deliver to Landlord a copy of any such plan and amendment
          thereto, if applicable. Tenant will not allow any lien to be filed
          against the Premises by IAI, and if any such lien is filed against the
          Premises, Tenant will cause it to be removed within thirty (30) days
          after the date said lien is recorded.

     (7)  Tenant must pay the sum of $24,113.99 (plus any applicable finance
          charges) to Gregg for engineering services relating to the Premises,
          which amount will be paid in accordance with any payment plan or
          amendment thereto entered into by Tenant and Gregg. Tenant will
          deliver to Landlord a copy of any such plan and amendment thereto, if
          applicable. Tenant will not allow any lien to be filed against the
          Premises by Gregg, and if any such lien is filed against the Premises,
          Tenant will cause it to be removed within thirty (30) days after the
          date said lien is recorded.

     (8)  Tenant must pay the sum of $39,596.72 to Partners for architectural
          services relating to the Premises, which amount will be paid in
          accordance with any payment plan or amendment thereto entered into by
          Tenant and Partners. Tenant will deliver to Landlord a copy of any
          such plan and amendment thereto, if applicable. Tenant will not allow
          any lien to be filed against the Premises by Partners, and if any such
          lien is filed against the Premises, Tenant will cause it to be removed
          within thirty (30) days after the date said lien is recorded.

     (9)  Tenant must pay the sum of $151,107.42 to CLC for subcontractor's
          services relating to the Premises, which amount will be paid in
          accordance with any payment plan or amendment thereto entered into by
          Tenant and CLC. Tenant will deliver to Landlord a copy of any such
          plan and amendment thereto, if applicable. Tenant will not allow any
          lien to be filed against the Premises by CLC, and if any such lien is
          filed against the Premises, Tenant will cause it to be removed within
          thirty (30) days after the date said lien is recorded.

     (10) Tenant must pay the sum of $12,793.00 to Advent for subcontractor's
          services relating to the Premises, which amount will be paid in
          accordance with any payment plan or amendment thereto entered into by
          Tenant and Advent. Tenant will deliver to Landlord a copy of any such
          plan and amendment thereto, if applicable. Tenant will not allow any
          lien to be filed against the Premises by

<PAGE>

Mr. Steve Golden
June 14, 2001
Page -4-

          Advent, and if any such lien is filed against the Premises, Tenant
          will cause it to be removed within thirty (30) days after the date
          said lien is recorded.

     (11) Tenant must pay to Landlord, on or before May 31, 2001, the sum of
          $10,000.00 as an additional security deposit to be held by Landlord in
          accordance with the terms of the Lease, which amount will be returned
          to Tenant at such time as Tenant has delivered to Landlord the letters
          of credit in accordance with paragraphs 3 and 4 above.

     (12) Tenant's full compliance with the terms and provisions of the Lease
          and this Agreement, and no new Event of Default (other than the
          Defaults) occurs under the Lease or this Agreement. The occurrence of
          any further Event of Default will entitle Landlord to void its
          forbearance in accordance with the terms of this Agreement, and
          Landlord will immediately be entitled to enforce its rights under the
          Lease and to exercise any other rights and remedies available to
          Landlord at law or in equity.

     The foregoing limited forbearance shall not be construed to impair the
ability of Landlord to enforce any such rights, powers or remedies after the
Forbearance Period regardless of whether or not such enforcement relates to
actions taken or payments received during the Forbearance Period, or during the
Forbearance Period for the occurrence of any Event of Default other than the
Defaults. Unless earlier terminated in accordance with the terms of this
Agreement, Landlord's forbearance, as provided herein, will immediately cease
without notice at the end of Forbearance Period, and Tenant at that time must
comply with and perform all of the terms, conditions and provisions of the Lease
without giving effect to the forbearance set forth herein.

     Landlord's forbearance is further expressly subject to and conditioned upon
Tenant's strict compliance with each and every term and provision of this
Agreement, and except with respect to the Defaults, Tenant's strict compliance
with each and every term and provision of the Lease. Tenant acknowledges and
agrees that Landlord has no obligation to extend the Forbearance Period and that
Landlord's failure to enforce any or all of its remedies under this Agreement,
the Lease, or under law or at equity after the expiration of the current
Forbearance Period will not give rise to a further extension of the Forbearance
Period absent a written agreement executed by Landlord to extend the Forbearance
Period.

     In no event will this Agreement be deemed to be a waiver, except as
specifically provided herein, of (i) the enforcement of Landlord's rights with
respect to any other Event of Default hereafter arising under the Lease; or (ii)
Tenant's compliance with any covenant or provision set forth in this Agreement
(a "Forbearance Event of Default").
<PAGE>

Mr. Steve Golden
June 14, 2001
Page -5-

     The forbearance set forth in this Agreement is limited precisely as written
and, except as expressly set forth herein, neither Landlord's forbearance nor
any other term or provisions of this Agreement shall or shall be deemed or
construed to (i) be a consent to any forbearance, waiver, amendment or
modification of any term, provision or condition of the Lease; (ii) affect,
impair, operate as a waiver of or prejudice any right, power or remedy which
Landlord may now or hereafter have under the Lease or any other document,
agreement, security agreement or instrument executed by an person in connection
with or related to the Lease, or at law or in equity, including, without
limitation, with regard to any existing or hereafter arising default; (iii)
impose upon Landlord any obligation, either express or implied, to consent to
any amendment or further modification of the Lease; or (iv) be a consent to any
waiver of any existing default (including, without limitation, the Defaults),
all such defaults remaining outstanding. Landlord hereby expressly reserves all
of the rights, powers and remedies specifically given to Landlord under the
Lease or now or hereafter existing at law or in equity.

     Tenant expressly acknowledges and agrees that the Lease (as amended by this
Agreement) constitutes the legal, valid and binding obligations of Tenant
enforceable in accordance with its terms by Landlord, and Tenant expressly
reaffirms each of its obligations under the Lease (as amended by this
Agreement). Tenant further agrees that it will not dispute the validity or
enforceability of the Lease or any of its obligations thereunder.

     Each party to this Agreement acknowledges that its legal counsel
participated in the preparation and drafting of this Agreement, and that each
has been or has had the opportunity to be represented by counsel of its own
choice throughout all negotiations which preceded the execution of this
Agreement, and that they have executed this Agreement with the consent and upon
the advice of said counsel. Accordingly, it is agreed that any legal rule of
construction to the effect that ambiguities are to be resolved against the
drafting party will not apply to the interpretation of this Agreement or any
amendments hereto to favor any party to this Agreement against the other.

     This Agreement may be signed in any number of counterparts, and each such
counterpart shall be deemed an original, and all such counterparts shall
together constitute one and the same.
<PAGE>

Mr. Steve Golden
June 14, 2001
Page -6-

     If you are in agreement with the foregoing, please execute this Agreement
by signing a copy in the space provided below, whereupon this Agreement will
become a binding agreement between Landlord and Tenant.

                              Very truly yours,

                              360 NORTH MICHIGAN TRUST,
                              a Delaware business trust

                              By:  MB BEITLER MANAGEMENT CORP.,
                                   its managing agent

                                   By:________________________________

ACKNOWLEDGED AND AGREED TO
as of the ______ day of June, 2001.

Coolsavings.com inc.

By: _____________________________

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}]]