From what I saw in the S-1, their core platform -- which I assume is ride hailing -- was profitable until Q4 2018. They offer heavy incentives in order to compete, but once they're sufficiently established in a market, looks like they can become profitable on that front by no longer offering promotions in order to fight Lyft/whoever.
They just need to stay solvent longer than the competitors, and being in more markets than the competition should help with that.
Their R&D is also massive, but they could stop most of that if they needed to.
As much as I love Amazon and always have, in the early days it was "just" ordering books online. Yes, that was great and again the UX was great but it didn't seem as revolutionary as Uber.
Edit: negative marginal costs -> negative marginal profits.
It’s why we use multiple metrics to evaluate a business, but it’s clear that Uber has large positive gross margins.
Ignoring all other expenses and saying that a company is a good business is ignoring reality.
I’m not just choosing a method that makes Uber look bad. They are not profitable or successful based on a legal GAAP definition of profitable.
If we just cherry pick numbers, we might as well think that WeWork’s made up metric of “community adjusted EBITDA” is valid.
https://news.crunchbase.com/news/wework-details-run-rate-rev...
https://techcrunch.com/2017/06/28/a-look-back-at-amazons-199...
If people are perplexed by uber today it's because the unit economics look horrible, and it doesn't seem like they will improve without a major technological advance.
Edit: TBF, I was curious so I checked out AMZN's first year of trading: https://finance.yahoo.com/quote/AMZN/history?period1=8528832...
They dropped 20% on day one. I don't think that reflects investor skepticism re: shopping online, but skepticism re: the myriad risks they faced as one of many money losing online retailers.