Sad to hear that, although it was airdrop, still has some value and now lost. Wonder if you ask the team behind the airdrop why would they choose that shitty exchange? Ever doubt there could be a foul play between both parties?
As you know most of newbie projects are kind of scam. So they choose such kind of exchange that requires less money to list. So yeah, it's both parties foul play.
Naturally I withdraw my assets instant after exchange. But this time I made a mistake and now lost my 0.353ETH.
I guess a shit scam exchange site will always be like this. It's not your mistake but the exchange site itself has already turned into the scam exchange site.
A trusted exchange site will never block all of funds that owned by the users and this is very similar with bcnex.