I get what you mean and I've thought about that. There's two things I'd point out. One, to what extent to people buy toriprime just for access to the toriprime board? I remember a while ago somebody actually posted the statistic and (at that time) the people that bought TP and posted in the TP board were in the minority (indicating the forum customisation was the bigger reason). Of course, there are some people who buy TP solely for the TP board (I was even one of them), so it's possible that these people will have less incentive to buy it.

That leads into my other point. Toriprime is about exclusivity. I think having a general forum-wide Wibble board wouldn't lessen that exclusive factor. There would be the free board, which everyone and their mother could post in, and then there'd be the paid one, which has a (for lack of a better word) more elitist clientele. The general wibbles for everyone to post in, and then the exclusive wibbles for forumers that paid money for it. In my mind, they serve different purposes because they target different audiences (that isn't to say that TP users wouldn't also post in the general wibbles).

I think I've explained that 2nd point rather poorly (as I'm in a hurry), but I think you can catch my drift.