Of course
It's obvious they're making money hand over fist people (like me) are forking out subs to pay to play the game, all they need to do is keep the servers working, the "in-game support" is pretty crappy and no doubt staffed by WoW addicts who probably couldn't afford the subs any more, so prostrate themselves before Blizzard and grovel to work for their playtime.
It's strange though that people think of it as a community, there's 10 Million people playing the game, it's no more a community than London is, it's just a bunch of individuals, it's a good business model until things go wrong of course, the subscribers are tolerant of brief outages and surprisingly don't complain too much about bugs (particularly if they can be exploited)
What can go wrong? Possibly the internet breaks, or WOTLK doesn't deliver and people just get bored.