Zynga Now Officially Using Credits Exclusively in Most of Its Facebook Games

In the culmination of an effort that began in earnest last year, Facebook has gotten Zynga, the largest social game developer on its platform, to start using Credits exclusively in all of its Facebook games. The two companies have just confirmed to us that Zynga has pushed Credits-only direct payment flows to most of its games, as we cover in more detail over on Inside Social Games.