A few month ago poloniex was my favorite trading platform. Not longer the case. They are one of the biggest platforms, they earn a lot of money, I don't understand how this can happen:

https://steemit.com/steem/@steem-buzz/poloniex-is-the-largest-owner-of-steem-after-steemit-50millions-usd-do-they-earn-any-interest-rate-do-they-have-any-incentive-to