Ah, that's what you're referring to. As I mentioned in a comment on the previous thread (which I now see you commented on two days ago), we didn't want to require phone numbers for verification and went the email-only route instead. Unfortunately there was a not-insignificant amount of abuse from temporary email addresses. Because they are temporary and throwaway accounts and we have no way of reliably contacting the humans behind those accounts, our best option was to prevent players from using accounts with those throwaway domains.

As you stated in your other comment, it sounds like you got your money's worth. Accounts can still be registered with non-throwaway emails.