I don’t pay. Once paid for a message board, but with so much free stuff out there, I don’t see a need to pay. With the message boards, there was an advantage and disadvantage to the pay part. The advantage was that since it was pay to post, there weren’t alot of yahoo’s spouting off or spam, but since it was pay, there isn’t alot of content either. People had great advice and comments to your questions though, but in the end, it wasn’t worth it.
I think an information site is very difficult to get people to pay for because they are relatively easy to set up and there are alot of them out there. The professor had a premium section to this site that was pay for awhile, maybe ask him for his thought’s/advice directly.