it would be easy to calculate for someone...
take a month worth of posts. calculate total amount of members, then calculate total amount of members only posting in the contest threads and "is she hot", etc. threads.
all webmasters knows this would take time, time that can be spent earning money instead. maybe one of the surfers can do the math for us
but who cares, it takes a few mins extra per day scrolling through surfer threads and replys. Same problem with spamemails every day, so no big problem for me.