I am mining your coin these days! And every freakin day i find a new coin delisted there with some bad excuse like broken chain or some other shit. From the outside i can see that the only problem is the attitude on the exchange.
Well, Phoenixcoin is 5 years old and has never had a broken chain since my takeover. If they have any issue with the wallet, I'm always ready to help. PXC was one of the first coins listed by Cryptsy and, later, by Cryptopia. Here's the tweet: https://twitter.com/Cryptopia_NZ/status/583085700943200256
I remember the times when they were a small exchange running a few dozen of coins. There are over 600 coins now and I realise very well what it takes to keep'em all in a good order. I recall Cryptsy had half as many coins listed in their heyday and they had their maintenance work done far worse.