The problem with just naming sources for ad spots is it takes years to find the exact right ones that work for your particular sites/business model. So what works for me for a single paysite may not work at all for you.
For example: I have a few links on niche specific blogs (headers and side bar text links) that are mostly for SEO purposes. While other places I do actual 'ad buys' where I get to place a banner on their site with a direct link back to my site. The Hun is a great place for this type of promotion.
But the other factor is the Law of Diminishing Returns, especially with niche sites. In other words, after a month or three chances are you have appealed to everyone visiting that site who may want to try out yours. At that point it's best to swap out the ad, or rotate offers, or just pull the ad for a few months.
Cams are a different animal so my thoughts are specific to paysites. Hope any of that helps.
