incrediBILL - 5:29 pm on May 5, 2010 (gmt 0)
I cant tell you guys how many times I've seen junk sites, extremely spammy sites with adsense ads.
Those probably earn the most.
People hit them, see nothing of value except the ads, and click an ad to escape.
Besides, 5 years into the future most ads will probably be on mobile devices and most of us aren't positioned to take any mobile ad revenue yet so brace for impact.