I believe this is the deal they worked out when Zynga and Facebook were in talks after Facebook credits came about. Zynga knew how much money they were going to

I believe this is the deal they worked out when Zynga and Facebook were in talks after Facebook credits came about. Zynga knew how much money they were going to lose by giving up a % of virtual items sold, so this is a way to make extra money. I really wish I knew how much revenue this translated into. On a similar note, Zynga needs to do everything it can to establish itself as a gaming platform of its own. I know they are trying to do that but to most people their games are still known as "facebook games."