It's moreso because they have had the Zeit wallet in maintenance mode since at least October and have stopped responding to trouble tickets to fix it. A couple of weeks back I tried to test it out by sending a few Zeit there and I couldn't even generate a wallet address to deposit to. It seems that if you already have a wallet address and already had Zeit there before the wallet went into maintenance mode you can make trades. But how trustworthy is it? Look at how much volume there has been on all pairings for the past few weeks. Why on earth would they not want to fix the wallet? Maybe we should all flood them with trouble tickets to fix the wallet.