I believe they were not banned but instead, their accounts got lost during the migration. Called the great ZU wipeout or something, as the migration affected the forum's database which included the members database.
There was a time, years ago when I posted as a guest (we used to be able to create guest accounts) and we could only post in two forums as a guest. The Help Forum and Chit Chat, I believe.
I think I recall Jason making announcements how he was going to purchase the board at some point.
People would ask him questions and as I recall, he used to mention how little, if anything would change.
I think too that the board was required to move due to some copyright issue(s)?
I cannot remember.
I also believe that a lot of arguments happened and lasted for months because the board was to be bought and/or movie, and so many people left as a result (some were banned also, I believe), and many never returned. So far as I am aware of.
That is all I can remember.
That was years ago!