I have found that people are making good adsense revenue using targeted popunder traffic. Is this legal? I read through the Google Adsense TOC and could not find anything about using pop under traffic for content adwords. There is something for use of Google search box in pop under traffic and adwords traffic cannot be directed to a site that has pop ups or pop unders as I understand. Which traffic methods have you found effective for adsense? What are your thoughts, opinions or findings in this regard?