Silk was mintpal era shit, with insta pump and dump shitcoin, devs abandoned this coin, the price now is high, it doesn't deserve a poloniex listing. Byebye shit, it is the history
Irishsalt it is, with that attitude you won't be even missed don't let the door hit your back twat.
For anybody else interested stay tuned, polo is de-listing a lot of coins on
September 5th, not today neither tomorrow, we're actively discussing solutions to at least have an active exchange for the swap.
Edit: Thanks Pr0metheus, messed that one up, not enough coffee.