At the end of the cycle of a Pixel model, they are heavily discounted. So much that it's probably close to hardware + development cost. Google probably expects to make a profit from Google One subscriptions, Play purchases, and ads.
By installing GrapheneOS, you are giving them nothing.
they're working on it. GrapheneOS has serious plans to get a phone made for them. even more serious now that Google has become openly hostile to their project by no longer publishing the Pixel device tree when new releases come out.
