Posted 2.8.11 : Latest Research and Markets survey estimates there are now almost 600 million social gamers
600 million – that’s the impressive number of social gamers on the internet, according to the latest Research and Markets study of the phenomenon…and the number is rising rapidly.
R&M reports that China made the greatest contribution to total player numbers in 2010, with 109 million players – the US was second, with 95 million, and R&M expects these numbers to rise to 273 million and 150 million respectively by 2015. 
"The global social gaming market was worth just under $1.5 billion in 2010, and is forecast to reach almost $4 billion in 2015," the report notes "The most important market [by value] is the US, with revenues of $670 million expected to grow to $1.2 billion in 2015. Japan is in second place, with a $180 million market that is forecast to reach $570 million in 2015 
"The Big Four leading games developers – Zynga, EA, CrowdStar and Playdom – have tended to dominate the Facebook social games rankings. However, fifth-placed Digital Chocolate is only a few million users behind CrowdStar.
“Zynga is far larger than its competitors, with 195 million active users across its titles, compared to second-placed EA's 39 million users."