People can come and tell us that in the refund thread. Once they proof it's them via a signed message we exchange the old account for the new one. E.g. James already did that and he is not the only one.
Yes, as long as they have original wallet and can sign or prove it. Otherwise they are screwed

By the way, the first 20 pages were free giveaway. They don't even have a wallet to prove anything
2Kool belonged to that group