Adult Site In Co-Op Network

Mostely I know who links to me and I watch my referring urls pretty often and now since I joined the network I was trying to watch my traffic and new backlinks very closely. Also I went through a lot of web sites that are in the network just to see who they are and what rankings they benefit form the network. Now when I saw non-related referral urls that I don't recognize I just go there and see if there are network ads. For example:
http://www.mebirdie.com/articles/birds/birds-article-321.htm this was a referral - I don't know them and they don't have links to me on that page.. but they do have network ads on the bottom. Here is another one: http://www.sedonamonthly.com/shopsedona/... This sites have nothing to do with real estate that I'm promoting though, but there are clicks through