>>275242127
There is evidence to prove what i said about facebook.
It is an assumption that valve does what you say because they haven't been caught doing that. Valve mostly uses your friend group,your existing library, your playtime in your existing library, your steam store search history and your wishlist as well as hardware census data to give you games. 
I don't see why they would sell that data to anyone else. And I don't see why or how they gather data other those just listed.

Buy a rift s because it's cheaper. Buy one because the index has rma issues and the vive is piece of shit. 
But don't try to justify it by claiming facebook is a more honest and less dangerous company than valve.