Forum Moderators: open
maybe a drawing at the end of each month for each person who signs up and writes a review?
I used to have "rate the site" and although I had some protection in place to thwart abuse a couple of webmasters were managing to get thousands of ratings for their sites.
When I caught them I sent them to a penalty box with a permanent 0 rating based in 9,999,999 submitted ratings, but eventually I shut it off as useless as they would submit something new and try to be even more clever about bumping their ratings.
Total headache.
How about requiring something from everyone who performs a rating? Such as requiring them to have a listing of their own and their web site will be rated by as many listing owners as they rate themselves. In other words, kind of like a traffic exchange where you let people have their listing rated by x number of people after they rate x number of listings themselves. This is much harder to game and it build more of a commitment and a sense of community.