It's not hidden away, it's in the agreement plain to see.
Anyway why are you so concerned? Google has access to your emails and anything in cloud storage. Microsoft said they can share you information, well they need to share some things like with Cortana for example.
It's so overblown all this. Come back in 10 years and let's see if those still running Windows 7 are any better off? I mean what should I be afraid happening?
Well it's only been 3 years but I'm still more than happy with my W7.
My problem is sooner or later I'll have to upgrade my PC hardware. But it's running W7 and all modern components have been rigged to only work with W10, so I will have to update the OS first, which I am not happy about at all. And then when I do the overhaul (it needs a new motherboard, CPU, memory, graphics card) the OS will probably go bananas because it will effectively find itself inside a new machine.
And no I'm not interested in just getting a brand new PC, because my case, heavy duty power unit, HDD and twin DVD drives are still all good.