This is spot on, and I'm going to call it for what it is. Just another way of Google creeping on user data to improve their products. The same way they do with fonts, email, ads, etc etc etc.

I for one I'm appalled that nobody really cares too much about this because of the covenience provided by Google tools, but we clearly have a situation building up where another RMS will come up with the equivalent of the free software foundation but from a privacy perspective.