I wouldn't jump to that conclusion just yet.
I'm one of those 3 million. Yeah, it's an impressive number....but keep in mind the game is "free".....just about anyone will signup if something is free if only to try it out. I'd love to see the percentage of those 3 million accounts that are "active" on a regular basis....I'm betting it would be a fairly small percentage, which I grant may still represent a larger user population than AH.