Um... so before 3.0 I've been a lazy bum and added a game once the counter on the front page hit a million (for example: 1.00 or higher), but this isn't really the real story since this number rounds up.
For example, I've had FIFA Soccer 08 up since last year (1.00), but it just hit a million this past week. Also, a couple of you guys have been talking to me about this same issue, so... to make this thread even more awesome, I'll actually look into the legitimate numbers seen at the bottom of each game's page. This will mean that some games wont hit the million mark as soon, but then again... patience is a virtue.