what about adding something so that only those with a license can post anywhere but the pre-sale area, and only those with a license can add a signature, update profile, have an avatar, etc.
I'm really against restricting anything forum related to users having a license... there are a lot of people here that are users of a forum (our own Ian Spense was one of them for quite a while). Restricting to that level will do far more harm than good...
vBulletin does this, it really grinds me as a web developer, because if i want to take a look at any of their code (modifications, updates, styles, etc) I have to go hunt down someone that has a license.