Bittrex is going down anyways, used to be good exchange long time ago but not anymore,
privacy is one of the fundamentals of crypto vs fiat so exchanges should support that
I've tried to find their comments about the delisting and haven't found it, they don't even explain why they do it. Ultimately, all exchanges will refuse (
Maybe you should use search engine if you don't get answer in this thread, I think the reason why exchanges delisting other coins is either the trade volume in each coin is getting lower and lower each day, so normally if the coin is not yet active or having few traders it is normal that exchanges delisting it, also add the fact that some coins now are being sued or having allegations by SEC, we should know that when this thing came up it really affects the position and image of the coin.