Well, I would suggest in the future if you wanted some help with questions not to be too critical for someone trying to explain in all trying to help you. As comments that are "extra useless" to you might be helpful to others.

Just as a data: my brothers Amz acct was shut down about 1.5 yrs ago along with his wife for transfers A>B>A. So shutdowns do happen.
Which was why I advise against it and adding an additional member (C) into the mix. But then guess this is "useless" info.
Yes, its very YMMV but better to be on the safe side, but to each their own.

Cheers