I'm not that crazy about the approach the author lays out to building traffic -- regurgitating public datasets -- but it is a fact that good content will probably surprise you with how it can pay off with AdSense. $2 - $7 Page RPM is totally do-able. Don't take the author's advice verbatim. Just think of whether you can build a site that will draw those volumes of page views, preferably a site with good content people want to see that will supported context-targeted ads.