It was only a matter of time before someone figured out that data mining was only going to get them so far
Not that data mining isn’t profitable, by all means, it is! But, adsense is more profitable in the short term.
Jensense writes about a new virus that installs itself on your computer and then subtly changes the adsense ads you would otherwise view, to be ads the virus author wants you to see.
I could see this affecting a LOT of computers eventually, and becoming a problem because people 1. don’t know it’s there, and 2. don’t care if it’s there, because they don’t want to see the adsense ads anyway.
Not good news for adsense publishers.