Bittrex is a very long shot right now, I would prefer something closer to CNO's profile.
Yobit for instance.
We can consider that but before that I am thinking about TradeSatoshi, mainly to get its good managed Faucet to complement my Affiliated App.

Yobit is ranked 25th among the exchanges, with a daily volume of $47,649,492
TradeSatoshi is at rank #135, daily trade volume is $82,499
There is a big difference...
Plus you can offer coins through Yobit's "Free coins" system, as you would with any faucet.
Think about it, the key to success is
adoption and
trade volume. It is more likely to achieve it by listing CNO to a higher volume exchange.