Otherwise you equally weight everything giving nobody any preference other than no data and no location.
Now you realize that everyone has disabled maps until you switch them on because you rely on API location information.
However the five years since you began enforcing privacy has allowed everyone to reach parity.. partly because nobody is piggy backing the others.
I can't think of the way I could trade off the what next situation I just described: get everyone using power hungry chips to get you a chance at the bad guy .. how does it work if you balance the players?
Imagine “trust” is a currency, and each user had a “trust account” into which more trust could be deposited (or withdrawn). Apple made a large deposit of trust-as-currency into each user’s account when they axed the Google Maps relationship. Google was demanding a large tax/withdrawal from each user’s trust account. Apple stopped that, effectively making a large deposit of trust back into each user’s account.
Yes, Apple’s Maps has suffered and been inferior. But it isn’t taxing/withdrawing from each user’s trust balance.