Because people are stupid, and will do *anything* to take your mind off of the fact that all ads are spam. Yes, *All* of them.
Really, the next time you see the banner ad from Yahoo! itself here, the one that says their ads "Respect your privacy and suit your tastes," see if you can't call them on that lie, because it is in fact a *Flagrant Lie*. I don't dig booty-dancing. I don't need car insurance because I can't afford a motor vehicle currently. WTF?
How dumb are people? [*shrugs*] I feel your pain.