Chinese social football game The Winning Goal II generates $800,000 per month in revenues

"The Winning Goal II, the sequel to Chinese online game developer and operator The9's self-developed soccer social game, generated nearly RMB 5 mln per month in revenues between February and May this year, with over 50% via Sina Microblog's gaming platform.
The Winning Goal games are similar to French developer Motion-Twin's My Brute fighting browser game, determining the winners of matches automatically, and is The9's earliest profitable browser game product, breaking the seven-figure RMB monthly revenue barrier in February after joining three gaming platforms, including Sina Microblog's, at the beginning of the year."

Source:  Techweb, via Marbridge Consulting, 23rd May 2012

Note - 5 million RMB = $790,000 according to XE.com, 23rd May 2012 - $1 = 6.33 CNY