it keeps growing because of the special "free" games and demo's they run all the time. the latest game to go "free to play" was team fortress 2 which as you can tell got a huge boost in players since they made it free. when CS:GO comes out i figure it will be at the top as well for awhile.
dick cheney loves me, he wants to take me hunting
mkwii code- 1977-0565-0049