This is just part of the general trend, of commercial interests trying to take over the web and milk your on-line identity. In particular, if you are interested a few links here.
Google privacy policy 'breaches EU law' - Tech News - Digital Spy and of course, it was not so long ago they were illegally collecting private wifi network details under the pretext of providing street view.
further info wrt google here -
Google Privacy Checklist: What to Do Before Google's Privacy Policy Changes
There's always the nuclear option: delete your Google accounts.
Source: PCWorld
Google Privacy Checklist: What to Do Before Google's Privacy Policy Changes on March 1 | PCWorld
and for you to try yourself, install 'collusion' if you run 'Firefox', and everyone should read the following if you don't believe the extent of data collection that goes on -
I'm Being Followed: How Google—and 104 Other Companies—Are Tracking Me on the Web
Who are these companies and what do they want from me?
Source: The Atlantic
I'm Being Followed: How Google—and 104 Other Companies—Are Tracking Me on the Web - Alexis Madrigal - Technology - The Atlantic
Now, who owns facebook, u-tube, and the like?
fwiw even getdpi sends info. to at least a couple of outsiders - 'me.com' and 'mac.com' - probably more, depending on what offsite links you click on.
Best wishes,
Ray