Poloniex set to delist dozens lots of coins in an effort to be 'legit'. So if you have any of these coins and your account is frozen or coins lost in transit you will probably lose them forever as Poloniex washes it's hands of you.
But on the bright side as they are trying to get a federal banking license, this may give those with problems with Poloniex a bigger stick to beat then with.

https://cointelegraph.com/news/circle-seeks-banking-license-trading-venue-registration-to-expand-crypto-services