I've got a debt scam site that highlights new scams and types of scams. I tried adsense but then some pages were displaying ads for the types of stuff the article would be warning about. I looked how similar sites monitized and found: 1. Pay me and I'll reseach that scam for you and let you know if it's legit. 2. "Everything is a scam...except these three great home-business ebooks. 3. Affiliate links to common stuff like weight-loss and getting rid of acne. How would you do it?
You might consider a donation based system with a few affiliate links tied in. I'll bet you can find a ton or Amazon books on the subject to promote.
They might have ads that warn people of scams. This will complement your site nicely. Sometimes, Google takes a while to provide really on target ads.