Unfortunately, Theokles, that's not really how it works. If, for some weird reason, 10,000 people came to the site right now and tried to register all at once, W3C would want there to be at least 10,000 free countries across all their worlds so that they wouldn't have to turn anyone away.
And Wendy, that wouldn't work either. Say they add "Lacerta II" because they anticipate an influx of new players. I then take a C3 in Lacerta II. The influx of players never comes, and so W3C decide to remove Lacerta II. Where do I go then?