I have emailed coinwarz twice and heard nothing back, though they don't really know who I am. They just delisted TRC on 2/8/16 (
http://www.coinwarz.com/cryptocurrency/coins/terracoin). I imagine with Cryptsy going down that was their reasoning.
Maybe if enough people email them they will relist it?
It looks like Bitbar has been delisted for almost a year. Why do you think they do that?
I don't know. Maybe someone will put up a new site with more coins so it would be useful.