>>48602EN wants to stay in their own server. It's their choice. They were invited to the JP multiple times, and have open invitations, but they don't WANT to. They want their own place.
ID did the same, but gave up after none of them really found the motivation to keep going in their own server, so they were shuttled to the JP server.
If you don't like it, that sucks, but the only person you can get mad at is the girl you watch, who decided on their own not to take up the invite.