First, let me clarify I am a "5 digiter", just having only subscribed a few days ago. I have, however, been lurking on the board as an unregistered visitor since sometime last year.
I also haven't subscribed to the premium services. I accept that as a freeloader, I'll take what I can get. Overall, I am pleased with something I get for free. I will say though that I would be more willing to subscribe to a better moderated board than I would be for straight analysis tools. (I already have my own analysis tools that I've built in the past 7 years, that work well for my style of fantasy play.)
My suggestion is this: What is the chance of implementing user-moderated functionality similar to that used on Slashdot? (
http://www.slashdot.org ).
I've found the system works quite well. As users read the threads, they "mod" up or down the validity or usefulness of the post in a variety of ways: Informative, Insightful, Humorous, etc.
By default, the posts that have been moded "up" are displayed more prominently, while posts that are off topic, trolls, or otherwise undesirable
Each user can then set their own thresholds on what type of post they want to view, hence filtering out the background noise.
I'd bet there a few slashdotters on these forums. If you're not, take a few minutes to browse some forum topics and you'll quickly see how it works. If you're not into "News for Nerds", you may not enjoy the subject matter, but I can honestly say the system helps provide some excellent insight from very knowledgeable people.
And, not having any definite figures to back this statement up, the traffic volume on \. is probably magnitudes greater than FBG. Which, imho, makes it a testament to the system's effectiveness.
All that said, I run a web-based software company, and I know that not all ideas, even good ones, are feasible to implement. Good luck guys.