Document:

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                                                                   EXHIBIT 10.17

                            AMENDMENT NO. 1 TO LEASE

      THIS AMENDMENT NO. 1 TO LEASE is entered into this 16th day of November,
1999, by and between 1330 BROADWAY, hereinafter called "Landlord", and
CYBERGOLD, INC., A DELAWARE CORPORATION, hereinafter called "Tenant".

      WHEREAS, by Lease dated July 15, 1999 (the "Lease") between Landlord and
Tenant, Tenant leased office space on the 12th floor of the 1330 Broadway
Building known as Suite 1200, 1330 Broadway, Oakland, California, consisting of
approximately 14,247 rentable square feet and expiring on July 31, 2002, and,

      WHEREAS, Landlord and Tenant wish to enlarge the area of the Premises,
and,

      WHEREAS, Landlord and Tenant wish to extend the expiration date of the
Lease, and,

      WHEREAS, Landlord and Tenant wish to amend the security deposit, and,

      WHEREAS, Landlord and Tenant wish to amend the pro rata share, and,

      WHEREAS, Landlord and Tenant wish to amend the base monthly rent, and,

      WHEREAS, Landlord and Tenant wish to amend certain other provisions of the
Lease,

      NOW, THEREFORE, FOR VALUABLE CONSIDERATION, THE RECEIPT AND SUFFICIENCY OF
WHICH ARE HEREBY ACKNOWLEDGED, IT IS MUTUALLY AGREED AS FOLLOWS:

      1.    Effective as of November 15, 1999 (the "Effective Date"), Section
1.1 of the Lease is hereby amended in its entirety to read as follows:

            1.1   Address of Premises:    1330 Broadway
                                          Suites 1200 and 1300
                                          Oakland, CA  94612

      2.    The Tenant's name and notice address, as set forth in Section 1.2(b)
of the Lease, is hereby amended to read as follows:

                                 CYBERGOLD, INC., A DELAWARE CORPORATION
                                 1330 Broadway, Suite 1200
                                 Oakland, CA  94612
                                 Attention:  Nat Goldhaber, CEO

                                 with a copy to:

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                                 Kenneth S. Katzoff
                                 Katzoff & Riggs
                                 3088 Claremont Avenue
                                 Berkeley, CA  94705

      3.    Effective as of the Effective Date, Section 1.3 of the Lease is
hereby amended in its entirety to read as follows:

      1.3   Rentable Area of Premises: Approximately 28,494 square feet

      4.    Section 1.4 of the Lease is hereby amended in its entirety to read
as follows:

      1.4   Term: (a)   Commencement Date: July 15, 1999

                  (b)   For a term of: Sixty-Four (64) months (expiring November
30, 2004)

                  (c)   Option to Extend for Thirty-Six (36) months

      5.    Effective as of the Effective Date, Section 1.5 of the Lease is
hereby amended in its entirety to read as follows:

      1.5   Base Rent: $51,289.20 per month.

      6.    Effective as of the Effective Date, Section 1.6 of the Lease is
hereby amended in its entirety to read as follows:

      1.6   Security Deposit: $45,644.60

The difference between the initial Security Deposit, and the amended Security
Deposit, in the amount of $25,644.60, is to be deposited by Tenant with Landlord
prior to the Effective Date.

      7.    Effective as of the Effective Date, Section 1.7 of the Lease is
hereby amended in its entirety to read as follows:

      1.7   Proportionate Share: 9.72 Percent

      8.    Section 1.8 ("Broker") of the Lease is hereby deleted in its
            entirety.

      9.    The second sentence of Section 5.a. of the Lease (beginning with
"Notwithstanding the foregoing" and ending with "delivered to Tenant.") is
hereby deleted in its entirety.

      10.   Section 6.b. of the Lease is hereby amended in its entirety to read
as follows:

            b.    Effective as of the first day of the thirteenth (13th) full
      calendar month of the initial term of this Lease and each twelve (12)
      months thereafter during the initial term, and effective as of the first
      day of the thirteenth (13th) full calendar

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      month of the Option Period and each twelve (12) months thereafter, the
      base monthly rent, exclusive of Tenant's share of Direct Expenses set
      forth in Article 8, shall be increased by Three Percent (3%).

      11.   Section 18 ("Services and Utilities") of the Lease is hereby amended
so as to add the following language between the ninth (9th) sentence (ending
with "electric current consumed for such use.") and the tenth (10th) sentence
(beginning with "Provided Tenant is not in default hereunder"):

      Tenant agrees to accept all existing equipment to the extent available
      located in the 13th Floor computer room, including the two (2) Liebert air
      conditioning units, raised floor and pre-action sprinkler systems (the
      "13th Floor Computer Room Equipment") in as-is condition, and Landlord
      makes no representations or warranties as to the condition of, or the
      sufficiency for Tenant's purposes of, the 13th Floor Computer Room
      Equipment. The parties agree and acknowledge that the 13th Floor Computer
      Room Equipment is the property of Landlord. Tenant shall, at its sole cost
      and expense, operate, maintain and repair, and at its election pay to
      Landlord the cost of removal or replacement of, the 13th Floor Computer
      Room Equipment. Tenant shall, at its sole cost and expense, pay for all
      utilities consumed by the 13th Floor Computer Room Equipment and equipment
      installed by Tenant in the 13th Floor Computer Room. Landlord, at Tenant's
      expense, shall cause an electric current meter to be installed for the
      13th Floor computer room so as to measure the amount of electric current
      consumed by the 13th Floor Computer Room Equipment and equipment installed
      by Tenant in the 13th Floor Computer Room, or may establish usage
      calculations by means of a consultant selected by Landlord.

      12.   Section 31 of the Lease is hereby amended in its entirety to read as
follows:

      31.   BROKERS. Tenant warrants that it has had no dealing with any real
      estate broker or agent in connection with the negotiation of its lease of
      Suite 1200 excepting only the broker named in Section 1.8, and it knows of
      no other real estate broker or agent who is entitled to a commission in
      connection with its lease of Suite 1200. In the event any claim is made
      for brokerage commissions, finder's fees or similar compensation by any
      person or entity other than the broker named in Section 1.8 in connection
      with Tenant's lease of Suite 1200 as the result of acts or action of
      Tenant, Tenant hereby agrees to, and shall indemnify and hold Landlord
      harmless for, from and against all

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      such claims, including costs, expenses and attorneys fees incurred by
      Landlord in connection with any such claim.

      In the event any claim is made for brokerage commissions, finder's fees or
      similar compensation by any person or entity other than the broker named
      in Section 1.8 in connection with Tenant's lease of Suite 1300 as the
      result of acts or action of Tenant, Tenant hereby agrees to, and shall
      indemnify and hold Landlord harmless for, from and against all such
      claims, including costs, expenses and attorneys fees incurred by Landlord
      in connection with any such claim. In the event that Landlord is required
      to pay a leasing commission to the broker named in Section 1.8 in
      connection with Tenant's lease of Suite 1300, Tenant shall reimburse
      Landlord for such commission payment. Such reimbursement shall be
      amortized over the remainder of the initial term of this Lease, and shall
      be paid as additional rent in equal monthly installments due on the first
      day of each month.

      13.   Sections 33 ("Early Termination"), 34 ("Right of First Refusal") and
35 ("Option to Expand") of the Lease are hereby deleted in their entirety.

      14.   The first sentence of Section 36.a. of the Lease is hereby amended
in its entirety to read as follows:

      Tenant shall have the right to extend the initial term hereof for One (1)
      additional consecutive period of Thirty-Six (36) months ("Option Period"),
      commencing immediately upon the expiration of the initial term hereof,
      upon the same terms and conditions as are stated in this Lease except for
      base rent.

      15.   Exhibit "B" to the Lease ("Floor Plan/Construction Obligations") is
hereby amended so as to include Exhibit "B-1" attached hereto.

      16.   After delivery of Suite 1300 to Tenant, Tenant shall execute a
written acknowledgement of the date of commencement of its tenancy of Suite
1300, in the form attached hereto as Exhibit "C" and by this reference it shall
be incorporated herein and in the Lease. In the event that the date identified
as "Term Commencement Date" depicted on Exhibit "C" hereof is different than
Effective Date stated in Section 1 of this Amendment 1, said Effective Date
shall be modified to the date depicted on Exhibit "C" hereto.

      17.   All terms used herein that are defined in the Lease shall have the
same meanings as therein defined, except as amended by this Amendment 1. Except
as amended by this Amendment 1, all the terms, covenants and conditions of the
Lease are hereby

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ratified and affirmed and shall remain in full force and effect.

      IN WITNESS WHEREOF, the parties hereto have executed this Amendment 1 on
the day and year first written above.

LANDLORD: 1330 BROADWAY

By:
   ----------------------------------
        Myron Zimmerman

TENANT: CYBERGOLD, INC., A DELAWARE CORPORATION

By:                                       By:
   ----------------------------------        ----------------------------------

Print Name:                               Print Name:
           --------------------------                --------------------------

Title:                                    Title:
      -------------------------------           -------------------------------

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                                   EXHIBIT B-1

                      FLOOR PLAN / CONSTRUCTION OBLIGATIONS

                                 CYBERGOLD, INC.

                            1330 BROADWAY, SUITE 1300

TENANT IMPROVEMENTS TO BE PERFORMED BY LANDLORD:

1.    Champoo Carpet

2.    Patch holes and touch up paint in some areas

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                                    EXHIBIT C

                         ACKNOWLEDGMENT OF COMMENCEMENT

1.1   (a)   Landlord: 1330 BROADWAY

      (b)   Tenant:   CYBERGOLD, INC., A CALIFORNIA CORPORATION

1.2   Location of Premises:   1330 Broadway, Suite 1300
                              Oakland, California  94612

1.3   Date of Acceptance:

1.4   Term Commencement Date:

1.5   Rent Commencement Date:

      The above terms are incorporated into this Acknowledgment of Commencement
as indicated above and referenced herein.

      This Acknowledgment of Commencement is made with reference to that certain
lease agreement (the "Lease") between the party designated in Section 1.1(a) as
Landlord ("Landlord") and the party designated in Section 1.1(b) hereof as
Tenant ("Tenant") dated as of July 15, 1999, and Amendment No. 1 thereto dated
November 16, 1999, regarding the certain premises generally located as set forth
in Section 1.2 hereof all as is more particularly set forth in the Lease (the
"Premises"). Tenant certifies to Landlord and the holders of any indebtedness
secured by the Building the following:

2.1   Tenant accepted possession of the Premises on the date set forth in
Section 1.3 and acknowledges that the Premises are as represented by Landlord
and in good and sanitary order, condition and repair; and that the improvements,
if any, required to be constructed for Tenant by Landlord under the Lease have
been constructed and are satisfactorily completed in all respects.

2.2   That all conditions of the Lease to be performed by Landlord as a
prerequisite to its full effectiveness, except punchlist items per Exhibit B to
the Lease, have been satisfied and that Landlord has fulfilled all its duties of
an inducement nature.

2.3   That the Commencement Date with respect to the Premises is as set forth in
Section 1.4.

2.4   That the Lease is in full force and effect and the same represents the
entire agreement between Landlord and Tenant concerning the Premises. 2.5 That
there are no existing defenses or offsets which Tenant has against the
enforcement of the Lease by Landlord and no offsets or credits against rental.

2.6   That the minimum rental obligation of said Lease shall is presently in
effect and that all rentals, charges and other obligations on the part of Tenant
under the Lease commenced to

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accrue on the date specified in Section 1.5.

2.7    That the undersigned Tenant has not made any prior assignment,
hypothecation, or pledge of said Lease or the rents thereunder.

LESSEE: CYBERGOLD, INC., A DELAWARE CORPORATION

By:
   ----------------------------------
Print Name:
           --------------------------
Title:
      -------------------------------<PAGE>   1
                                                                 Exhibit 10.18
                            AMENDMENT NO. 2 TO LEASE

      THIS AMENDMENT NO. 2 TO LEASE is entered into this 8th day of February,
2000, by and between 1330 BROADWAY, hereinafter called "Landlord", and
CYBERGOLD, INC., A DELAWARE CORPORATION, hereinafter called "Tenant".

      WHEREAS, by Lease dated July 15, 1999, as amended by Amendment No. 1 to
Lease dated November 17, 1999 (the "Lease") between Landlord and Tenant, Tenant
leased office space on the 12th and 13th floors of the 1330 Broadway Building
known as Suites 1200 and 1300, 1330 Broadway, Oakland, California, consisting of
approximately 28,494 rentable square feet and expiring on November 30, 2004,
and,

      WHEREAS, Landlord and Tenant wish to extend the expiration date of the
Lease, and,

      WHEREAS, Landlord and Tenant wish to amend certain other provisions of the
Lease,

      NOW, THEREFORE, FOR VALUABLE CONSIDERATION, THE RECEIPT AND SUFFICIENCY OF
WHICH ARE HEREBY ACKNOWLEDGED, IT IS MUTUALLY AGREED AS FOLLOWS:

      1.    Section 1.4 of the Lease is hereby amended in its entirety to read
as follows:

      1.4   Term: (a)   Commencement Date: July 15, 1999

                  (b)   For a term of: Seventy-One (71) months (expiring June
                        30, 2005)

                  (c)   Option to Extend for Thirty-Six (36) months (until June
                        30, 2008)

      2.    The first sentence of Paragraph a. ("Option") of Section 36 ("Option
to Extend Term") of the Lease is hereby amended in its entirety to read as
follows:

      Tenant shall have the right to extend the initial term hereof for One (1)
      additional consecutive period of Thirty-Six (36) months ("Option Period"),
      commencing immediately upon the expiration of the initial term hereof,
      upon the same terms and conditions as are stated in this Lease.

      3.    Subparagraph (i) of Paragraph a. of Section 36 of the Lease is
hereby amended in its entirety to read as follows:

                  (i)   Tenant shall exercise said option by written
      notification to Landlord no later than Nine (9) months prior to the
      expiration of the initial term.

1330 / CYBERGOLD - AMENDMENT NO. 2 TO LEASE
PAGE 1

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      4.    All terms used herein that are defined in the Lease shall have the
same meanings as therein defined, except as amended by this Amendment 2. Except
as amended by this Amendment 2, all the terms, covenants and conditions of the
Lease are hereby ratified and affirmed and shall remain in full force and
effect.

      IN WITNESS WHEREOF, the parties hereto have executed this Amendment 2 on
the day and year first written above.

LANDLORD: 1330 BROADWAY

By:
   ----------------------------------
        Myron Zimmerman

TENANT: CYBERGOLD, INC., A DELAWARE CORPORATION

By:                                       By:
   ----------------------------------        ----------------------------------

Print Name:                               Print Name:
           --------------------------                --------------------------

Title:                                    Title:
      -------------------------------           -------------------------------

g:\wp51\wrkgroup\amendmnt\1330\1200cybr.a2

1330 / CYBERGOLD - AMENDMENT NO. 2 TO LEASE
PAGE 2

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