I'd probably pay for access. Even if it means being flamed by the occassional punk. Of course if I was paying for platinum access I would expect more than just putting them on my ignore list.
A Kill-User feature would be a plus
Kidding Aside:
I'm just not sure about the direction the marketing gurus are taking.
The coolest thing about this forum for me was the $DNF.
It gives incentive for users to post.
Not that there really worth anyhing considered in the time it takes to make a decent post.
Why not get the funds from the users in other ways.
If they are making money off of selling their domains.
Make the selling domains section payable by $DNF only.
Imagine that! Your own true $currency that could compete with the dollar

You could easily keep track of the exchanges and take a percentage of the sale and you would'nt have to charge any up front fee. It's set to one domain listing a day anyway.
If users want to list more than one a day charge em an extra $1 or 2$
I know that tracking the sales of $DNF sounds complex and you'll always have your cheaters but.
It wouldn't be that hard to do. You already have the info you need. IP's for one. But any good hack could set the thing up to check for domain transfers and operate the $DNF exchange.
The majority of the users on this forum would be honest enough to pay a percentage of a sale anyway.
If thats not enough.
Have a EULA that the user has to agree too before they even post a domain for sale. If the domain is tranfered within a 30-90 day period you collect a fee if it wasn't sold via $DNF
Sounds complex but its just data...good data = $$$$$$
Cheers!