Facebook gaming is one of the most popular pastimes of late and close to 70 million users (of the total 400 million Facebook users) play just one game – Farmville. This explains the scope of this market. Monetization is not proving to be very difficult too with multiple avenues to sell virtual goods and services.

According to a study by developerAnalytics, the top 10 game developers on Facebook have a cumulative monthly active user base of 458.3 million (user overlapping included). Here is the list of these game developers, the Monthly active user numbers.

1. Zynga : 237.1 million
2. Electronic Arts : 53.3 million
3. CrowdStar : 49.2 million
4. Playdom : 37.1 million
5. Rock You : 23.0 million
6. Mindjolt Games : 21.4 million
7. Pop Cap Games : 10.7 million
8. SlashKey : 9.6 million
9. Country Life : 9.3 million
10. Meteor Games : 7.6 million

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