Exchanges trying to stifle nano by pretending it doesn't exist

go on the coinbase subreddit and filter by "top posts of all time", what you find might shock you, the very top post of all time is a post asking coinbase to please list nano. So it's not like coinbase isn't aware of nano, coinbase just chooses to ignore it and never list it for some strange reason.

Similar thing is happening with bittrex... a few months ago the bittrex CEO went on a twitter rant about how much he's impressed with nano, how much he likes it... THE CEO! ... A week ago Nano's community manager informed the nano community that although the CEO of bittrex apparently loves nano, his listing team is strangely refusing to list it. SO... we can see that we have many exchanges out here just systematically ignoring and refusing to list nano... almost as if they're trying to kill it off by ignoring it. Very interesting... here's the CEO's tweet btw: https://twitter.com/StephenStonberg/status/1445501353304870920

Any plausible explanations for this? besides of course the obvious and quite nefarious conclusion one could come to which is that exchanges wish to kill off nano by forever ignoring it and pretending it doesn't exist? Maybe because these exchanges are heavily invested and involved with POW coins, thus the entire POW industry, and coins that all charge fees of some sort, and that nano would basically make almost all of these exchange's digital asset/ digital currency offerings look a bit outdated & wasteful & inefficeint in comparison? hmm.... IN other words nano would kill these exchanges golden goose, which is acting as a shitcoin casino