Google can keep your phone if you send it in for repair with non-OEM parts

No they can't, that is basically illegal in every jurisdiction. Will not even click on that click bate title.

This is legal? BRB just setting up my own "repair service"

I could understand refusing to repair it but come on at least send it back.

Can't imagine this to be legal in too many countries.

Isnt that just... stealing? I mean, if that works, then im opening a fast food chain with a t&c you have to sign that legally allows me to take all your posessions...