Exchanges claiming things is meaningless, and the little history we have with crypto has proven exactly that. Bittrex legit ruined my legacy account while they said that they wouln't touch it initially, or at least, not subject it to the newer policies that would apply to new registrants.

Poloniex did the exact same thing before Bittrex. Poloniex refugees ended up using Bittrex, it then became one of the largest exchanges by volume, they then realized that Bittrex is doing the exact same thing as Poloniex did to them, and they ended up on a wide variety of exchanges after that.

Knowing this, people should no longer expect the exchanges they use to respect their prior statements or terms; they are the game, and they change the rules whenever they want. It's not for nothing that there hasn't been one single exchange on top for years. One exchange messes up, the other knows what they did wrong and use that in their advantage to offer a better service.