[alexismadrigal]

Agree. It's pretty obvious where they are going with this. And from an advertiser's perspective, it's pretty sweet. Right now, the distinction they are trying to draw seems to be that they'll only use you to advertise things that you choose to follow.

But what's to stop them from your "implicit" endorsements of products/services you use from location data or with machine vision (something Google can already do with many logos in Street View imagery, I've discovered in my reporting)? Oh, that's right. Nothing. Which is why they don't want to have to ask for permission to do these things.