Once a proven number of posters is established... that should be no problem. The admins typically look for 10 regular (daily/weekly) users to justify a forum.
That does not sound unreasonable but there were zero threads in the Chitown supporters sub-forum the other day when it was established..... just sayin'..... If you open it, they will come.......
I'm out of the loop on that one. That forum was handled through the supers and admins prior to the team forums even being established. They don't typically start a forum without justified support. I'm sure we'll see traffic pick up there soon enough.