Poloniex refused to support Bitcoin Gold

According to official statement of cryptocurrency exchange, BTG won't be supported unless it had implemented replay protection
24 October 2017   3844

Popular US-based cryptocurrency exchange released statement regarding the BTG hardfork.

We've stated in the past that the safety of our users' tokens is our chief concern. As such, we have refused to support a forked token unless it had implemented replay protection. We would like to further urge our users to be immensely cautious of any token that expects to be given private keys that control value on another blockchain. This is dangerous and unnecessary, even for an alt like BTG that seeks to distribute tokens using the state of an existing blockchain.
 

Poloniex Statement

Additionally, Poloniex released reminders that apply to all balance-duplicating alts:

  1. If you wish to be guaranteed tokens distributed according to existing blockchain address balances, you should keep your tokens in addresses for which you control the private keys.
  2. If Poloniex credit accounts with forked tokens, they will do so according to balances at the time of the fork. If you have tokens on loan at the time of any fork related to that token, they are not in your balance, therefore you will not receive any forked tokens for them.
  3. Under no circumstances will we redeem tokens distributed according to the balances of addresses that contain customer funds and keep them for ourselves. Should we redeem them, we would only do so to distribute them to our users.

 

Poloniex to Delist Number of Tokens

6 tokens will be delisted from the exchange gradually, starting 15.10 and ending up 15.11
10 October 2019   234

The Poloniex exchange will no longer support the crypto assets Pascal (PASC), Steem (STEEM), Navcoin (NAV), GameCredits (GAME), LBRY Credits (LBC) and Clams (CLAM). The marketplace reported this to users in the mailing list.

Here are some important dates to keep in mind:

  • October 15th at 16:00 UTC: trading of PASC, STEEM, NAV, GAME, LBC and CLAM will be disabled
  • October 28th at 16:00 UTC: LBC withdrawals will be permanently disabled
  • November 15th at 16:00 UTC: PASC, STEEM, NAV, GAME, CLAM withdrawals will be permanently disabled

Please be sure to withdraw your assets before the withdrawal deadlines shown above. 
 

Poloniex

Reasons for the decision weren't mentioned.