If a game world is opened and within about 24 hours (maybe not exactly 24.0 hours) it has 500/500 players, this might show something. For sure some places will open up at some point but would you like to join a game with almost 500 players after it has been going on for a number of (real) days already?
As discussed in other posts already, if you do not join in the beginning, what are your chances of really being able to develop a descent company. Obviously many, many, many people have been waiting for a new game world to open. It might be an idea to open up more game worlds more frequently in order to avoid this kind of a situation.