[yen223]

Not nearly enough, by all accounts.

[rhp]

Zynga accounted for 15% of Facebook's revenue in Q1. Although Zynga's contribution declined compared to last year, payments and fees revenue (mostly from apps) doubled over last year to $186 million. That's not an insignificant amount.

Source: http://techcrunch.com/2012/04/23/zynga-made-up-15-of-faceboo...