Speaking of forums that charge money - there is this community by Fools.com that is charging money and I guess is making money and I think people are still glued to it. I think this is analogous to comparing this with HBO and free cable.
If this site has to generate profits, attorneys who are frequenting this web-site should have to pay the site owner some money. This will help in two ways - one to help the site keep running and the other would serve him/her to become popular and advertise.
I really like the current setup where there are no ads on this site. But, I guess it cannot continue like this forever as you need a lot of money to keep this site running. Or since they have our email addresses, are they making money by selling to third-party so called partners? I donn't see any effect on my inbox because of this though - but it can happen in future.