Poloniex is missing out on all the fees that Bittrex has been earning. Bittrex has had many days where upwards of 1000 BTC worth of Steem has been traded. I expect the Steem trade volume to explode when it gets listed on Poloniex since there are a lot more funds held there and the exchanged is held in higher eSTEEM but crypto whales than Bittrex. Good days ahead.