If Polo wants to maintain their good image and high volume in the long run they really have to clean out the shitcoins.
Let Yobit and other small exchanges have those. Focus on quality not quantity.
That is it dear , every coin listed in a big exchange like polo or bittrex must be a verified market at least with a working stable network . this will let them have a good volume too also will reduce the loss to other new trader who know nothing about the technologies/blockchain of every coin just to follow a
dead end HYPE