Rationale
We developed the Ubercart Coupon Referral (uc_coupon_referral) module because every company wants to promote their products and services as much as they can, but many companies are hyper sensitive to the negative reputational impact of looking like a spammer. Word-of-mouth advertising is a proven way to promote a brand in a safe and socially responsible way, and it has been shown that people are far more likely to engage in it if they get something in return for access to their social network, good name and reputation. So we developed a coupon based system that rewards both sides if a word-of-mouth promotion is successful.