i read all the tips and i want to add something that if adsense is not working then you can use some content ads/inline ads on your site , it is more successful then adsense. it will help you get some extra revenue from your forum because forums are usually content rich.
What about changing the colors on the banners? Has anyone ever tried to do so? Does Kontera usually have high payouts?
Grow the PR and sell text links. You can make some awesome revenue from that. Adsense cannot beat that, at least in my case
Anyone else have some more tips? Like adplacements or other tricks to make more revenue of your board?
Honestly it doesn't help and you end up exhausted. Kontera's PPC rates are better than bidvertiser e.t.c. but not as good as adsense. It's still a good program IMO and one that's far better than the rest of those adsense/ypn alternatives.