I think this is the wrong model to think about companies like Uber. Their business model is not based on unit economics, but on becoming a monopoly. Their goal

I think this is the wrong model to think about companies like Uber. Their business model is not based on unit economics, but on becoming a monopoly. Their goal was to seek rent permanently on the taxi business by putting all other taxi companies out of business. If you look at it that way, losing money to put competitors out of business seems like a viable strategy.