Will an account that has not been opened for a long time be deactivated? Will there be a notification via email at the beginning? Usually, yes.
This is how it should be, where account owners must have strong passwords or disable 2FA so that their accounts cannot be easily hacked.
2FA is the safest way to secure casino accounts because almost all casinos now have 2FA features.
I never heard of BC.game deactivating accounts for inactivity.
I don't think it has anything to do about whether the account has 2fa enabled or not.
If there was such a policy, I would've read about it from here.