I'm not usually good at faqs, but we can try to make an informal one here for what works and doesn't for ypn. From my sense of it, YPN is good for: 1. Pages where there is only one ad. 2. Pages with traditionally low CTR. YPN is bad for: 1. Dynamic sites. Hmm, not that big is it? Sorry, that's all I could think of. Ask some questions and if I know the answer I will respond.