Yes I am the dev.
There were a big problem in the system regarding to the 1 LTC offer (maybe you got it at the beginning), the fact is that it was impossible to withdraw it (just this specific offer), so we disabled it, sorry for the convenience.
However, any deposit/withdraw work, for any amount.
I suspect the same thing happens with airdrops token and bounty) people will not be able to pay off sold tokens) This is not a good start for your exchange. I am away from your platform. You have to think of better promotion than give free token and then say, "sorry, we've disabled that"
It's easy to spit on people projects.
The bounty and airdrop are real. You did not try, so you cannot talk about it, sorry.
I know that it is not a good start, but we try to do our best despite of these kind of errors.