Gemini does not close accounts as far as I know because of 'taint'. They have closed accounts for many other reasons, some of which are semi-legit and others that are 100% BS and many of them arbitrary but I have never seen a reliable report about them closing for taint.

Fail any form of KYC --> Closed
Don't give them info they request --> Closed
Something changes in your life and you don't tell them --> Closed
Log in from a restricted location even with an account from another part of the world --> Closed
What looks to be moving money without a reason to their security even if you are not --> Closed
And so on.

Not defending them, but there are 1000s of the above type reports, no reports that I trust of 'they did not like my BTC'

-Dave