and they dont' pay % of their revenue to the 'base station entity'.

This Uber trick: taking % of the revenue for the fixed cost service (they provide to the taxis drivers ) is the master trick making uber money.

So far, in Europe, all taxi corporations charge taxi driver FIXED (quite small 100..200 usd/month) amount for operating telco/web/radio and coordinating fleet of taxis.

Uber's ability to push bulshine here is really business milking 101 course: Fixed costs, uncaped incomes.