To this day I don't even really understand the value that Uber et al are supposedly adding that justifies the size and evaluation of their companies.

At the end of the day they're a layer on top of a taxi business. Sure this is useful in some way but like Airbnb or weworks or all these other companies that just throw one layer of service over the actual business I don't understand why they are treated like high tech companies.

The most extreme example was possibly moviepass which was basically just a subsidy from investors to movie goers.