If you want my opinion, it was never really listed. You can't pretend you are listing a coin for exchange without providing the means to make deposits and withdrawals.

It is, what, a way to make more transactions?
Because you could buy it or sell it only, without being able to trade your coins or withdraw the coins you bought to your wallet.

Edit: and I don't care if it has the best price of any other exchange. I am not able to trade the coins I mined there nor am I able to buy some coins and transfer them to my wallet for POSing.