Hi are we allowed to post our adsense ads in forums. CAn we post it on the profiles page and in every post on the forum?
Yes. If you're using vbulletin, put it in your header file and it will show up in every post. If you want deep integration and are using vbulletin, checkout this link.... http://www.vbulletin.org/forum/showthread.php?t=107965&highlight=adsense+deep+integration
As long as comply with one page uder 3 units ads 3 link units 2 referrals no matter what kind of site all are allowed
I could be wrong, but that question might be asking about this forum specifically. In which case, the answer is no, but you can submit your publisher id in the options and get adsense rotation on these forums.
If it is not your forum, you usually have no ability to insert javascript code in it (nor to the profile, nor to the post).
Forum advertising (in my experience) causes your account to get smart priced due to very poor click through ratios from your members. If you go this route, I suggest only showing advertisements to guests. This also does a lot of good in avoiding a Google investigation from "supportive" members who click on your ads a lot. Good luck.
It only depends on the subject. If the forum is about a topic that's popular with advertisers, you'll do well. You will have low CTR anyways, but your overall earnings might be okay.