Are these users still active on the forum? Would their vouches be considered good enough to unblock my account?
If you can sign a message from
this address, you will be good to go with the recovery.
I don't think the accounts recovery team will accept a signature from the stated address because it was posted right before the account was hacked again.
A staked address earlier on, way before the hacks would have been very suitable, but he says he doesn't have any that he can use to sign a message except those that are directly linked to his exchange wallets