I guess it depends on how you would implement such a system. They could have a ban on the game ownership NFT too, but it doesn't have to work like that. Banning is usually done on the account level, it's entirely possible that the company keeps track of your hardware fingerprint so you can't just go and buy a new game.
In this case it's probably just a weird edge case that triggered the account deletion, I think he'll get his account back.
