Actually, at least in the UK, Ubers are licensed by local councils. They have all sorts of stupid restrictions like if they drive someone to another city they cannot pick up any passengers there so they have to drive back empty even if a customer could have booked the journey. This is Enforced, DRM style, by the app. The same rule exists for local private hire companies but they can ignore it when it makes sense to.
That would be an example of the opposite. Uber is pretty much a tracker (peer-to-peer platform) for unlicensed taxis.