I read this the other day and found it very interesting! http://www.fastcompany.com/online/68/pricing.html SubEtha
A good article ..... The professor mentioned is someone whose writings are worthy of a read ...... FYI I counted about ten ad-tracking attempts by the site when I clicked on the above link .... if you go there you might want to turn on the ad tracking blocking feature of your browser or other software .....
I use ad-aware. It seems to do the trick. I have no popups folowing me around the net on non-popup sites, and that particular page displayed virtually ad-free for me. www.lavasoft.nu