Didn't really know where to put this but is the following bit from an article on VistaPrint talking about sites like SR? If so, don't see what the problem is.

Meanwhile, Citron Research issued a negative report on the company Tuesday, suggesting VistaPrint could lose 44 percent of its net income ? the portion it derives from referral partnerships with third-party websites ? as the U.S. Senate begins an inquiry into such online referral programs.