HuskyPup - 12:21 pm on Jul 31, 2012 (gmt 0)
Welcome to WebmasterWorld TheTAZZone
According to my host stats my main site gets about 400,000 page views a month and returns a revenue of less than 0.1% of that. My combined sites which total about 1 million page views a month ( according to my host stats ) returns a revenue of less than 0.15% of that.
Your host's stats will not be the same as AdSense stats since AdSense filters out most of the crap botnets, spiders and other junk however you should be able to see a fairly reasonable correlation between your stats and AdSense stats.
What do AdSense stats report as your CTR?
I do assume you have your forum set-up as a channel?
FWIW most forums have notoriously low CTR rates, well, many who have posted here have reported so.
Are you sure you're not a victim of hotlinking to images? I had this problem a couple of years or so ago and my "visitor" numbers exploded even in AdSense yet there were, obviously, no extra clicks. At its worst this was in excess of 1 million extra clicks a month.
What do your host's stats report on your traffic referrals?
And lastly, for clicks to occur people have to be in the buying research cycle, visitors to forums searching for info or solutions to problems etc are not generally in buying mode.