I don't think hacking is the obvious one. What a mighty coincidence it would be that someone's account only gets hacked after they die.
Realistically speaking - no - the way you put it.
But my objection was more towards the imposter being in control from the beginning. I just don't see that.
Of course one of his family members retrieving the funds and account is also plausible as someone suggested elsewhere, but then that would mean one of his family members is the sort of scumbag that would do this, which is less likely than he just gave his account to someone he spoke to online.
We can agree to leave his family out of this, and go back to the main question:
"Did Bruno voluntarily give access to his account?" [for money or without]
My line of thinking indicates a solid "no", for various reasons, the main one being the
failed Gleb account sale.
But since we are at it, how plausible could an inside job scenario be, just to smear Bruno's account and contribution, for constantly busting scam-friendly alt accounts?
Pretty hilarious bud, I know.
