Mintcoin was on Bittrex earlier this year until July 17th.

Bittrex started a Delisting campaign and included mintcoin in the list of hundreds of coins they delisted.

The fact is that the majority of mintcoin holders don't like the Bittrex exchange interface over the others enough to move most of their trading to them to keep it from being delisted. That may change if they ever update their interface, but most minters still dislike them for the delisting.
IMO : The Delistings due to lack of resources was a lie on their part trying to trick coin users into using their exchange, because you can check other exchanges which support a large # of coins with no complaints and no delistings due to trading volume.