I wonder what would happen if Facebook ran a scheme like AdSense. Maybe that is/was one of the aims behind the Like button? Facebook could use that connection

I wonder what would happen if Facebook ran a scheme like AdSense. Maybe that is/was one of the aims behind the Like button? Facebook could use that connection to tailor the adverts displayed to the user (along with the site's content!), provided the user is logged into Facebook at the time. Admittedly, I think doing so would kick up a bit of a stink ;)