How does Über, Deliveroo, etc work? They pretend spending in marketing but actually subsidizes market acquisition with VC money (for instance Deliveroo pays the delivery guy at least 7.5€, but charges the customer 2.5€: it just doesn't add up), with the assumption that they can form an actual monopoly and eventually reimburse investors by ripping off workers and customers in the mid term.
The only upside I see is that they actually spend money from quantitative easing and market bubbles in the real economy. They're a symptom of a sick financial system and a sick economy.
This business model doesn't belong to companies, but free association of workers. They all (Über included) should be closed down, the sooner the better.