If you really want to find an answer to your question why they closed deposits, then you should ask them (exchanges) directly.
And if you still think I know anyone from these exchanges, then you are totally mistaken(you have no tangible proof).

I merely shared public information based on what I can see online.
I have no insider info or anything, heck not even a dev.
I rely on ChatGPT most of the time.

In any case, this does not concern me anymore.
Have a nice day and good luck.