What bank would want them? They're unregulated and largely a mystery. I find it incredibly arrogant on their part that they'd expect any bank to want to business with them. They're an instant red flag.
Having said that this Tether shit is ancient and they'll no doubt figure out some kludge until the next time. Meanwhile the same old conspiracy shite will go quiet and bubble up again at a later date.
I find it really weird how willing so many exchanges have been to embrace it. There's something about the entire set up that doesn't compute for me and never has.