What is truly alarming is the speed with which most tthreads get bumped down to page 3 out of site and mind of WSO traffic.
At $20 a bump each time, my clients have to be bumping up their threads somtimes every 8 hours. This is shocking. Each time they bump up less people buy until by the 4th or 5th bump they are literally wasting their $20.
What this means is that less traffic actually view their offer before it gets relegated to the back pages.
We have worked out that this is roughly equivalent to PPC 25p/click!! for your average offer unless you are offering automated backlinking or SEO.
Now it appears that google adwords will have advantages over this model as you can pause your adwords campaign and change whenever you want and you don't get pushed from where the eyeballs can see you unless you are quite foolish.
With WSO's you have no choice as you see your thread sink out of sight.
The deep pockets in this forum are again able to dominate as they are able to continually renew their threads.