If the casino inactive the accounts if it is not logged in for certain period, they should follow the same rules for everyone. If some is a part of the casino team, he should be active and if not, the account should be deactivate. Also it is a good practice to disable the inactive accounts for security reasons. It helps in avoiding situation where someone hacks an inactive account and maybe misuse it in some context.
If the owner can easily reactivate it, this is a good option.
A better method would be to force the users to create a strong password, so it becomes very unlikely that anyone would be able to hack any account by bruteforcing it