Forget polo for now. Go to Yobit, talk to the admins, and then go to Bittrex slack and talk to admins ... = Coin adds.
Devs, this has to be done by you. We will all support it as well, but you need to show face to get on bittrex at least.
I agree, poloniex should not be priority right away. They are very picky and using a lot of resources, time, just seems like a waste of time at the moment. Yobit and Bittrex should be feasible in short term.