Why would Poloniex want to add competition such as HEAT and Waves etc. No way would they want to promote them. it will be a slow start for these DEX exchanges but if they make a great product and get some liquidity then the sky is the limit. Good luck
I have spoken to the owners of Poloniex directly. Your statement is absolutely untrue. There are reasons Waves isn't listed right now and they have the Heat white paper with an initial thumbs up. But let's get a freaking product first before worrying about Polo.