"2) The support issue could be better answered by Ted or Charles, but the paid support looks like it is needed if the problems aren't easily resolved. So you still get support like problems with understanding features, bugs, things like that. Like I said, I don't know all of the details on the support side, but I do know that you don't have to pay just to ask a basic question."
If you spend much time on the UBB support forums, you'll see that the moderators are much given to telling people to open a support ticket for which you must pay rather than tryiing to work out the problem in the free forums. This is one of the reasons for people fleeing UBB.