Uber needs to be on the list. They have had employees tracking their Ex's whereabouts. They have publicly boasted of being able to identify "rides of shame" after your One-night stand. They collected location information beyond what was necessary to pick you up. Plus, you know, being union-busting, misogynistic, democracy-undermining, corner-cutting and pedestrian-killing frat boys. But the reasons above seemed to be…
What ranking factors would you suggest I add to cover Uber?
Which makes me think that they're deactivating your account and basically keeping as much data as they can legally get away with.
Since I doubt any of the other companies on your list are openly ignoring the law and keeping more than permitted, the logical conclusion would be that Uber is just as bad your top contenders.