I see no evidence that they lack a notion of how to make it profitable. Are they doing it in the near future? No, but why do they need to? There are clearly plenty of people happy to fund for the long-term payout.

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.