But if they cut it too much, they'll stop growing.
The problem is they need to sustain their 70 billion dollar valuation for investors to be happy.
To be worth 70 billion they have to be either:
Growing at a very fast rate (which requires a very large burn rate to sustain)
Or be generating billions in profit each year. Even with a cut burn rate, they aren't going to be generating billions in profit. So they won't be worth $70 billion.
People will stop using Uber if the wait times get really long, which they will if most of the drivers leave.
Their profitability problem isn't just one of opex. They don't have margin, either.
http://www.nakedcapitalism.com/2016/11/can-uber-ever-deliver...
My main takeway: revenues are higher than their cost of sales. In other words, they are earning money on marginal rides served. Not losing money.
To me, this suggests that profitability is plausibly achievable if they end subsidies into small markets and drastically cut development costs.
Yahoo for example is coasting along at a market cap of 53.40B down from its high of over $125 billion[1]. In 1999 dollars. Is it "dead"?
[1] http://www.businessinsider.com/yahoo-market-cap-over-time-20...