As Yoshi-P said, there were 120k people playing the open beta concurrently (aka: at one time). 120k is a LOT smaller than the people who have the game now, and are trying to log in and play. Far less than half, in fact (as the dev team said that if they took the number of people trying to connect and play across all time zones at once, it would be 300k+ people). If the game had only sold 120k copies and that's how many people would be trying to play, things would be fine. But it's not. They sold a larger number of copies than that, in addition to the 1.0 people coming back and playing, so that there are more than 200k+ people trying to play. Their servers can't handle that. Removing the login restrictions, booting the AFKers.. none of that would work to allow you to play this very second. If they did that, the game would be crashing. Constantly. Nobody would get to play.

Does that explain things better?

PS: This stupid 1,000 character limit on posts is dumb.