A collegue of mine plays world of nerdcraft, and we figured out that blizzard receives about 48 million euros a month from the monthly fees. Excluding the base cost of the game itself.
I think I already mentioned it in the other thread, but personally I think wow-players are insane and should pick up guild wars asap. But then again, no one ever listens to me
You know, if WoW was published by EA games no one would be playing it.