Yeah, I've heard it too. I've read this on their slack channel and their IOTA twitter.
Though the api is quite intriguing because the use "troll" to name IOTA. I think Bittrex is going to add IOTA soon since it's on the major cryptocurrency markets like Bitfinex and Coinone which is the biggest exchange at Korea. Binance also added IOTA. I've heard also that Bittrex is also on slack channel few weeks ago. So at least it give us hope that they will IOTA soon to their platform. But unfortunately, i just sold my Miotas. Anyway, IOTA just made it to the 5th seed at the coinmarketcap and will surpass XRP soon(i just assumed).