а, поспешил... не прочитал последний абздацъ:
...You can register a Q account with your nickname though, and the account is named after your current nick. But after that, it doesn't matter what nick you use. Basically, you can't create a Q account with name XYZ unless your nick is XYZ when you create it.
Да, все правильно, надо регить Кубота и тогда резервят твой ник.