I have some suggestion for new sever opening.
1. The system should send a mail to all severs to describe when the sever gonna open. Many player dont know when to have a new sever, and you should do some advertising. I think new sever will get more profit than old sever. Old customer would like to open a new account in new sever. Also the system could just send a email to the AFK players to notify them new sever if you have their email address.

2.In order to get more players. Old servers players could also suggest friend to new server, and they both will get rewards.