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.
Well, that actually nothing new in this business. I have had accounts at other sites that actually charged the player for inactivity (in case there was still money in the account). A strapped for cash site like BC wouldn't surprise me if they did the same thing actually, just because nothing surprises me with these people after what they have pulled over the past 8 months or so.