System for implementing a performance-based customer referral program

A system that provides services for implementing a referral program in which participant sites refer users to a computer-implemented retail site, the system comprising:

• a referral tracking system configured to track referrals of users from the participant sites to the retail site using information encoded in referral links provided on the participant sites, said referral tracking system operative to maintain data that associates particular item purchases made from the retail site with particular participant sites to which such purchases are attributable;
• and
• a report generation system that uses the data maintained by the tracking system to generate activity reports for particular participant sites, said activity reports revealing, for a particular participant site and time period, a total number of user referrals that occurred, and how many of said user referrals resulted in purchases;
• said referral tracking system and report generation system comprising computer hardware that executes program code.