Hi Sasha, I still don't get my question answered about waves. Maybe I miss it or something like misread.
Waves is a good altcoin with good platform and also have a great development. So why it can't listed on Poloniex?
I think you should ask Tristan why waves are not added to Polo. I think Tristan and the company are afraid of the waves that could put an obstacle on their way to becoming billionaires.
Sasha can't take the decision for an exchange to add an altcoin.
You must indeed contact the exchange directly.
Polo can make big advantage against Waves DEX if they enable spinning Trollbox again.

I think Waves is a direct competitor to any other centralized exchange. So Poloniex don't want to give to much light on Waves at the moment.
But I'm sure they'll list it the day everybody know about Waves anyway.
I can not remember exactly when but Sasha sometimes commented about Polo possibility in Waves slack, you should be able to find screen shot copy in this OP but don't ask me which page of over 2,000 threads...
So, one day, they will list Polo in high probability.