Poloniex is making a power play that is likely to up sign ups by allowing pre-fork trading for the Bitcoin Cash fork Bitcoin SV.
You can learn more about the Bitcoin Cash fork here, or you can learn more about Poloniex’s offer from their parent company Circle. See: Poloniex Offers Pre-Fork Trading Ahead Of Bitcoin Cash Hard Fork.
"Poloniex Offers Pre-Fork Trading For Bitcoin Cash" contains information about the following Cryptocurrencies:
Bitcoin Cash (BCH) + Bitcoin SV (BSV)