That seems to be common practice by now. Had nearly the exact same thing happen with a Microsoft account. I posted a technical question on their forums and did

That seems to be common practice by now. Had nearly the exact same thing happen with a Microsoft account. I posted a technical question on their forums and did not give out my mobile number on account creation. Account was locked shortly after without any explanation. Then decided it was not worth it and tried to delete the account. I would have needed to give my mobile number again to even get the option to delete it... Of course you cannot contact support without an account either. Well, their dead database entry then.