He didn't say he participated in so many bounties for the coins, he probably might have bought the coins through the ICO sales. Though, I get why you might have said so because he has so many coins and looking for an exchange to put them in with verification; it sort of looks somehow though.
But OP, I don't really get you, do you mean stock exchange or coin exchange? There is different between the two though.
Hope he will come you better to understand it mate. I advice you to better go with pm him and you can answer for the issue then. If you do not understand why you simply wasting your time to this person mate.
I see many people spamming out the various even the op poster did not reply for the further. If he got the answer or not active mostly they would reply buddy, better you can stay way from these kind of threads.