On: 25 bucks from Google for your search data

[luser001]

I think they get to track all pages you visit, time spent per page, which parts of the page are in the viewport, for how long, where on the page you click, etc.

Not just a stream of what Google pages you visit.

[veverkap → luser001]

Wonder how this impacts Incognito windows.

[Mavyrk → veverkap]

For the non-blackbox version where you install the extension, I'm assuming if you were paranoid you could just use Firefox's incognito mode.