Document:

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                                                                   EXHIBIT 10.15
                         FULL RECOURSE PROMISSORY NOTE

$600,000.00                                                    November 30, 1999

     FOR VALUE RECEIVED, the undersigned hereby unconditionally promises to pay
to the order of SNOWBALL.COM, INC. (the "Company"), at 250 Executive Park Blvd.,
Suite 4000, San Francisco, CA 94134, or at such other place as the holder hereof
may designate in writing, in lawful money of the United States of America and in
immediately available funds, the principal sum of Six Hundred Thousand Dollars
($600,000.00) together with interest accrued from the date hereof on the unpaid
principal at the rate of 6.08% per annum compounded monthly, or the maximum rate
permissible by law (which under the laws of the State of California shall be
deemed to be the laws relating to permissible rates of interest on commercial
loans), whichever is less, as follows:

     1.  PRINCIPAL REPAYMENT.  The outstanding principal amount and any accrued
interest hereunder shall be due and payable in full on November 30, 2003.

     2.  INTEREST PAYMENTS.  Interest shall be payable annually in arrears and
shall be calculated monthly beginning November 30, 1999 on the basis of a 360-
day year for the actual number of days elapsed.

     3.  PREPAYMENT.  This Note may be prepaid at any time without penalty.  All
money paid toward the satisfaction of this Note shall be applied first to the
payment of interest as required hereunder and then to the retirement of the
principal.

     4.  SECURITY.  The full amount of this Note is secured by a pledge of
shares of common stock of the Company, and is subject to all of the terms and
provisions of the Stock Pledge Agreement, dated of even date herewith between
the undersigned and the Company.  Upon any default of the undersigned under this
Note, the Company shall have, in addition to its rights and remedies under the
Stock Pledge Agreement, full recourse against any real, personal, tangible or
intangible assets of the undersigned.

     5.  NATURE OF DEBT.  The undersigned hereby represents and agrees that the
amounts due under this Note are not consumer debt, and are not incurred
primarily for personal, family or household purposes, but are for business and
commercial purposes only.

     6.  WAIVER.  The undersigned hereby waives presentment, protest and notice
of protest, demand for payment, notice of dishonor and all other notices or
demands in connection with the delivery, acceptance, performance, default or
endorsement of this Note.

     7.  COSTS AND EXPENSES.  The holder hereof shall be entitled to recover,
and the undersigned agrees to pay when incurred, all costs and expenses of
collection of this Note, including without limitation, reasonable attorneys'
fees.
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     8.  GOVERNING LAW.  This Note shall be governed by, and construed, enforced
and interpreted in accordance with, the laws of the State of California,
excluding conflict of laws principles that would cause the application of laws
of any other jurisdiction.

                              Signed: /s/ Jim Tolonen
                                     -------------------------------------
                                      Jim Tolonen<PAGE>

                                                                   EXHIBIT 10.22

CONFIDENTIAL TREATMENT                  **Confidential treatment has been
HAS BEEN REQUESTED FOR                  requested with respect to the
CERTAIN PORTIONS OF THIS                information contained within the
DOCUMENT                                "[**]" markings. Such marked portions
                                        have been omitted from this filing and
                                        have been filed separately with the
                                        Securities and Exchange Commission

                               December 29,1999

Mr. Mike Seidenberg
Business Development
Desktop com
275 Ninth Street
San Francisco, CA 94103

     Re: Desktop.com Letter Agreement
         ----------------------------

Dear Mike:

     This letter agreement is intended to constitute our binding agreement as
to its terms, for the foundation for a business alliance between Desktop.com and
snowball.com.

     Snowball.com desires to make Desktop.com's services available to users of
the snowball.com sites, which include IGN.com, ChickClick.com,
PowerStudents.com/InsideGuide.com and the Snowball.com affiliates Desktop.com
desires to top into snowball.com's 2.6 million registered users and 4.4 million
unique visitors (Media Metrix 11/99) and convert snowball.com users into
registered users of Desktop.com. The parties intend, therefore, to jointly
develop a "Customer Acquisition Program" to be implemented on the snowball.com
sites. It is the intention of the parties to generate registered users for
Desktop.com through snowball.com's provision of a series of links, buttons,
banners, e-mail blasts and other promotional efforts on the snowball.com sites.

     The terms set forth below will constitute the entire agreement between
the parties.

We agree as follows:
-------------------

     .    parties acknowledge that the Affiliate Commerce Portal may not be
          fully operational on February 1, 2000. In that event buttons, banners,
          or mutually approved alternative advertising vehicle will be used to
          generate the guaranteed impressions until such time as the Affiliate
          Commerce Portal is launched.

     .    snowball.com will allocate the guaranteed impressions evenly over the
          term of this agreement.

     .    snowball.com's obligation and Desktop.com's sole right in the event
          that snowball.com. fails to deliver the above-listed number of
          guaranteed impressions will be for snowball.com to deliver any
          deficiency, as soon as practicable in subsequent months.

<PAGE>

     .    Desktop.com will control the distribution of the guaranteed
          impressions across the snowball.com-sites. Desktop.com shall provide
          snowball.com with an initial requested distribution prior to the
          commencement of this agreement on February 1, 2000. Desktop.com may
          change the requested allocation at any time upon reasonable notice to
          snowball.com; provided that, Desktop.com acknowledges snowball.com may
          not be able to make a requested reallocation in any given month due to
          inventory constraints. snowball.com will provide Desktop.com notice of
          such constraints within a reasonable time of receiving a request to
          change the allocation of impressions.

E-mail Promotions:
------------------

     .    Desktop.com will receive a text-ink within the "E-mail Blasts" that
          snowball.com sends out each month. snowball.com will guarantee
          delivery of [**] emails to snowball.com registered users pursuant to
          the delivery schedule specified to snowball.com users at the time of
          registration.

     .    Desktop.com and Snowball.com will jointly develop the text of the
          message to accompany the text link to be delivered with snowball.com,
          E-mail Blasts. snowball.com will provide Desktop.com with an
          opportunity to review the message prior to distribution of the message
          to snowball.com registered users.

Additional Marketing Opportunities:
-----------------------------------

     .    snowball.com agrees to include Desktop.com in mutually pre-approved
          press releases.

Support:
--------

     .    snowball.com will assign a dedicated Client Services Manager to
          monitor and maximize use of Desktop.com content and services by
          snowball.com users.

     .    The Client Services Manager will provide Desktop.com with regular
          reports in electronic format of current impressions and performance
          under this agreement.

     .    Desktop.com will be able to change creative throughout this agreement
          and will not be limited to a defined number of changes.

Term:
-----

     .    The term of this Agreement will be [**], commencing February 1, 2000.
          However, should the start date (i.e. the date on which snowball.com.
          begins serving Desktop.com's ads), be delayed for more than 30 days,
          then the term will automatically be renegotiated in good faith by the
          parties. However, any change in the term will be subject to the
          parties' written agreement.

                                              **Confidential treatment has been
                                              requested with respect to the
                                              information contained within the
                                              "[**]" markings. Such marked
                                              portions have been omitted from
                                              this filing and have been filed
                                              separately with the Securities and
                                              Exchange Commission

                                       2
<PAGE>

Compensation:
-------------

     .    Desktop.com will pay snowball.com a [**] partnership fee, with [**]
          payable up front upon signing and [**] additional payments of [**] per
          month to complete payment. Late payments will bear interest at the
          rate of [**] per month, or the highest rate permitted by applicable
          laws, whichever is lower.

Performance Benchmark:
---------------------
     The Goal of this program is for snowball.com to deliver users to the
Desktop.com site for registration and grow the membership database for
Desktop.com.

     .    After two months, snowball.com and Desktop.com will meet to review
          and reform the partnership program, if needed, in order to maximize
          performance. This review will include a review of the effectiveness
          of the marketing and promotional activities set forth in this
          Agreement in delivering users to the Desktop.com site and services.

     .    Provided that [**] of the impressions for which snowball.com has
          guaranteed delivery [**] have been delivered by the end of the second
          month after the effective date, if less than [**] snowball.com users
          have clicked-through a banner, button, button link, or e-mail provided
          link to a Desktop.com site or service ("Click-Throughs") at the end of
          the second month after the effective date, then Desktop.com shall have
          a right to commence a one month probationary period upon written
          notice to snowball.com

          .    The probationary period shall run from the end of the second
               month after the effective date to the end of the third month
               after the effective date.

          .    At the beginning of the probationary period, the parties will
               meet and mutually agree to an increased number of banners,
               buttons, e-mail blasts, and other promotional efforts, over the
               average monthly impressions delivered in the prior two months,
               that will be likely to achieve a total of [**] ClickThroughs by
               the end of the probationary period, and snowball.com will deliver
               the agreed increased number of impressions during the
               probationary period. The impressions guaranteed, during the
               probationary period are not to exceed twice the initially
               guaranteed impression level for that period [**]. The number of
               impressions delivered during the probationary period over the
               average monthly impressions delivered in the prior two months
               will not count toward the guaranteed annual impressions set forth
               in this Agreement,

                                              **Confidential treatment has been
                                              requested with respect to the
                                              information contained within the
                                              "[**]" markings. Such marked
                                              portions have been omitted from
                                              this filing and have been filed
                                              separately with the Securities and
                                              Exchange Commission.

                                       3
<PAGE>

          .    If at the end of the probationary period fewer than [**]
               snowball.com users have clicked through to a Desktop.com site or
               service, Desktop.com shall have the right to terminate the
               agreement upon written notice effective at the end of the
               probationary period, unless the parties mutually agree to extend
               the probationary period and the heightened promotional efforts
               agreed to during the probationary period. If this agreement is
               terminated pursuant to this section, Desktop.com's payment
               obligation under the agreement shall be [**].

          .    If less than [**] of the impressions guaranteed to be
               delivered over the term of the Agreement [**], have been
               delivered by the end of the second month after the effective
               date, the Performance Benchmark and probation provisions above
               shall have full effect, provided that, the numbers [**] and [**]
               shall be reduced proportionally by the number of impressions
               actually delivered over [**] of the guaranteed impressions [**].

Limits on Marketing Relationships with Desktop.com Competitors

     .    For the purposes of this letter agreement it shall be understood that
          "Desktop.com Competitors" means (a) [**], (b) [**], (c) [**],
          (d) [**], (e) [**], (f) [**], and (g) [**].

     .    During the term of this agreement, (a) snowball.com may accept banner
          advertisements from Desktop.com Competitors; provided, that such
          banner advertisements in the aggregate are no greater than [**]
          ([**]) of the number of impressions guaranteed to Desktop.com,
          herein; (b) snowball.com will not provide placement within any
          Affiliate Commerce Portal for any Desktop.com Competitor; and (c)
          snowball.com may issue press releases with Desktop.com Competitors;
          provided that, no press release may be issued that promotes a
          partnership between snowball.com and a Desktop.com Competitor that is
          similar in scope or purpose to the partnership set forth herein.

Cooperation and Miscellaneous Terms

     .    Desktop.com acknowledges that snowball.com's performance of this
          Agreement is dependent upon Desktop.com's full performance and
          cooperation. Accordingly, the parties agree that Desktop.com's
          obligations under this agreement are subject to such performance and
          cooperation.

     .    Desktop.com and snowball.com agree that the provisions set forth as
          Exhibit A attached are incorporated herein by this reference.

     .    Desktop.com acknowledges that it has received, read and understands
          the terms and conditions of this letter of agreement.

                                   **Confidential treatment has been
                                   requested with respect to the information
                                   contained within the "[**]" markings.
                                   Such marked portions have been omitted
                                   from this filing and have been filed
                                   separately with the Securities and
                                   Exchange Commission

                                       4

<PAGE>

    IN WITNESS WHEREOF the parties have entered into this Agreement.

snowball.com                           Desktop.com

     /s/ James R. Tolonen                     /s/ Kathleen C. Burke
By: _________________________          By: __________________________
       James R. Tolonen                        Kathleen C. Burke
Name:________________________          Name: ________________________

       COO/CFO                                 CEO
Title:_______________________          Title: _______________________
       1/07/00                                 12/30/99
Date:________________________          Date: ________________________

                                       5

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