... and even degree of monopoly on violence. Uber can do quite a bit of damage to a person by choosing to refuse service if someone needs to urgently be somewhere (or away from somewhere). Airbnb is controlling access to safe shelter. If Amazon grocery stores took off, having a bad Amazon account could deny a person access to food.
I don't think it would take more than a handful of gig-economy service corporations unifying under one umbrella of data-sharing for the average American to start experiencing something a bit similar to the Chinese experience of social score. For now, there's no incentive for them to do so.