[dschoon]

Related: I've often wondered why no one has found a successful way to brand opt-in ad targeting. You'd have to be big enough for it to matter (Google?), but it would have a tremendously positive effect on both the end-user experience, and on ad revenues.

[alain94040]

Because people would just opt-out (or not opt-in at all), therefore leaving you with an Internet with no ads, and Google with no revenue.

That's probably why.