in the computer history sometimes ZERO budget games are called AAA game like: http://de.wikipedia.org/wiki/Pong.
or do you call Pong not a AAA game?
the "budget" does not make a AAA game. its the "Popularity" in the "masses"
and if a game gets 100 000 and more players all the time day and night and people waiting in hold 30 minutes and longer to play a game then it is a AAA game.
sometimes all server are full and you wait 30 minutes or longer for a game and they have a lot servers LOL