This is the same for every internet service, and the primary experience when signing up to big centralised services like Facebook, LinkedIn or Twitter. If they think your account is suspicious in any way, instantly gone with no way to appeal, I've seen a number of friends experience this recently and they're not even outliers using a VPN or 'unusual' email or anything. At least with federated services, you have the opportunity to keep backups of your profile and sign-up with another instance whenever you want.