I would assume that @binance-hot does not keep track of which accounts sent them money. It's not like the @hkdev404 account has a sister account on Binance. There is no account linking. This is why you send coins to @deepcrypto8 with a memo. The memo tells the money which account to send coins to on Binance.

From Binance, you can send the coins to any account on Steem. Thinking that Sun would not get the airdrop is foolish imo. There would be no way to fact check it behind Binance's centralized database. We don't have access to that, and we know that Binance is on Sun's side, tentatively, behind closed doors.