A few hours ago we got a response from them :
We gauge demand based off of tweets, hash power, length of bitcointalk thread, volume on other exchanges, etc. Follow us on twitter @bittrexexchange and tweet about how much you like this coin and Bittrex. We respond to creative and insightful posts to help market your favorite coins and Bittrex. I'd also consider coming to our irc channel #bittrex on irc.freenode.net and do some guerrilla marketing. The traders there can help you gain exposure for your coin.
Regarding the first consensus poll, we are getting many responses from you by the form, and the most "requested" developements are starting to clear out. Keep up the voting, remember you can submit your proposals until 23th of March
Also go ask them in their slack to add CYG! ---> http://slack.bittrex.com