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Uber has become the symbol of everything right and wrong with Silicon Valley today
travis kalanick uber
travis kalanick uber

(REUTERS/Kim Kyung-Hoon)
Uber CEO Travis Kalanick acknowledges attendees during the Baidu and Uber strategic cooperation and investment signing ceremony at Baidu's headquarters in Beijing, December 17, 2014.

Uber is the ultimate test of whether the last eight years of venture investment in Silicon Valley was worthwhile.

Uber is valued at $60 billion. It's privately held. Nobody outside its execs and a few investors really know what its books look like.

If Uber someday turns into a highly successful company with a massive market cap — say, equivalent to Facebook, which is now worth over $300 billion — then this "unicorn" era of billion-dollar startups will turn out to be, on balance, a win.

If Uber collapses under the weight of mounting losses, then the last eight years of venture funding will have been revealed to be a colossal waste and exercise in mass delusion.

Uber's importance became clear in the course of a remarkable pair of essays from a couple of prominent venture capitalists this week.

The argument centered on how much money a startup should take, how much is too much, and what happens when the investment climate turns sour before massively funded companies can get to liquidity.

Uber as validation

First, Greylock's Simon Rothman wrote a post called "Why Uber Won."

He argues that Uber was smart to take advantage of a time of extremely easy borrowing by borrowing a ton of money — it's taken on equity investment of more than $9 billion and debt of $1.6 billion — and using that money to buy a whole bunch of things at once.

It bought drivers by giving them hourly wage guarantees. Once it had drivers on the road, it bought riders by offering heavy discounts and using heavy marketing. This created a virtuous cycle — more drivers meant faster pickups for riders, which meant more riders would choose Uber, which meant more drivers would sign up to drive, and so on.

Rothman argues this is how Uber came from behind — Lyft was actually the first company to do this kind of ride-sharing — and become dominant in the US.

lyft
lyft

(David Paul Morris/Bloomberg via Getty Images)
Lyft CEO and cofounder Logan Green, who came up with the ride-sharing business model before Uber.

Now, according to a recently leaked financial document that Bloomberg reported, Uber makes an operating profit on each ride in the US (as long as you don't count certain corporate-wide expenses like taxes and equity compensation for employees), and is now applying the same playbook overseas, where its losses are still immense.

Rothman and his firm are not investors in Uber.