Zynga Inc. (Nasdaq: ZNGA), creator of FarmVille and other popular social games, has lost its special relationship with Facebook.
Zynga and Facebook Inc. (Nasdaq: FB) have had a symbiotic relationship since 2010 by which Zynga was the only provider of social game software that was allowed to promote its games to Facebook's one billion users. In return, Zynga used Facebook's credit system to process payments even on its own Zynga.com games platform.
The close relationship between the two companies had made Zynga the single largest contributor to Facebook revenues outside of advertising. For its part, Zynga is thought to have received about 80% of its revenue from Facebook users.