Blogger
I noticed a while back that blogger assigns blogspot ads according to the blog and what the blog seems to be about. It seems to search for random words and do its best. My blog usually has ads for political books and websites or RPG books. Angel Mills usually has ads about Romance Novels and Audiobooks. I've seen gardening supply ads on Double N's blog. Well, I mentioned the Nuremberg trials a few posts ago and got an add for "Nuremberg Trials VHS: Great Classic from your past; Relive your Childhood. " Yeah, when I think about my childhood, I think of Nazi war-criminals.