As I mentioned elsewhere in the thread, an advertising company has incentives to collect and process as much data about individuals as possible. This is Google's core competency.

Oh, and in Google's case specifically, they now control the largest web site, one of the largest web browsers, (with this) the protocol it talks to, and they're attempting to supersede JavaScript too... and one of the largest client-side frameworks. The list goes on and on. The largest mobile phone OS. Email provider. (?) Working on social network...