The principles of the present invention relate to methods and systems for marketing products by prompting customers to identify purchased items to be shared through their social networks and displaying links on the customer's social networking sites, thereby promoting particular products to members of their social networks, which may then propagate through other parties' social networks, where the amount of social activity generated by the sharing of interest in the products is tracked and scored, and the original customer can receive a portion of their purchase cost credited back as a reward.