Likewise here, I feel your frustration. Myself and an associate have both had massive drops in adsense revenue the last few months, after previous months of steady increases beforehand. A large portion of the ads recently are irrelevant rubbish, like adsense spam, they can afford to bid high because no-one would click on them anyway. New ones come in almost as fast we can block their urls.

I'm currently considering using Commission Junction's Ebay affiliation for related auction keywords, I should search to see if anyone here has had any success with it.

I'll be watching this thread for other alternatives for two community oriented support sites that we prefer to keep subscription free.