MMOG or Massively Multiplayer Online Game is a widely used cloud application that never makes it to any discussion on cloud computing. MMOG is expected to be $9B market by end of this decade with its ground zero in China. WOW (World of Warcraft) which debuted in China reached a peak concurrency of 500K users. These cloud applications have tens of millions of registered users with millions of daily visits. This industry has spawned an ecosystem around the applications with operators called MMOs. As with all technologies they have now introduced open platforms for games.
These gaming platforms have already experienced the issue that business oriented cloud computing platforms and later operators will face.
Appleap.com shows which games/apps are the most popular on Chinese SNS.
