Its worth considering that 3 is actually quite common within large companies as well. I can think of a few industries dominated by big tech that have never turned a profit or even positive free cash flow.
The thing that actually puzzles me is that in the post-Kalanick era, Uber didn't more aggressively pivot to essentially being a taxi company where drivers supply their own vehicles. You've got a working app--how many people do you need to maintain/enhance it? Self-driving isn't happening in an economically interesting time horizon--certainly not reliable door-to-door in cities. So raise prices, cut costs, and have what's a fairly attractive taxi business for many places.
Of course, that may not have been what investors wanted to hear.
Of course, that may not have been what investors wanted to hear.