Would this be against TOS? Basically a page outside the forum, but linked, without google ads on it. That would be like a 'bank' for the forum. Which would show where the forum is spending money, and where money is coming in (donations, ad sales, and other listed). No mention of google ads.
I believe this would be considered encouraging people to click on ads. I am aware of the community chest option for ezboard, but I doubt something like that would be okay with Google. Only sure way to know though is to ask them directly. That way if they say yes you can implement it without having to worry about it.
They said it's fine to declare earnings on our site in the manner which I described, BUT without drawing undue attention to the ads.