This is what Bittrex replied when I requested it:
Bill (Bittrex)
May 28 09:36
Hi,
Thanks for contacting us about your coin. We look for coins that have high community demand, innovations to cryto-coin technology, or a contribution to science or humanity. Given the demand for coin launches, we limit ourselves to only a handful a week. Launching is free and at our discretion. If you'd like to guarantee the launch of your coin and get additional marketing in our platform, we offer the option to spotlight your coin for 1.0 BTC.
To help speed up the process of deploying your coin, we'd like the following information:
* Coin Name
* Coin trading symbol
* Launch Date (past or future)
* Github Link
* Exchanges you are currently on
* Official blockchain explorer
* What is your TxFee for a transaction
* What do you believe your min trade size should be
* A png image for your coin with a transparent background
We are mindful of scams, copyright violations, and offensive subjects and reserve the right to refuse any coin on our platform.
Looks like a standard message
I say just wait. They'll add it for free once the payment systems for these sites are up and running and the coin takes off properly.
I agree ole boy. Now if you could reject everyone else's hashrate apart from mine it would be greatly appreciated