How Robinhood makes money

Robinhood, an investing app valued over $5 billion, says it's trying to "democratize America's financial system" by making investing accessible to the little guy with free trades. But is this millennial focused FinTech juggernaut really upending the financial services industry? Or is it more like a traditional brokerage than you'd expect?
Tue, Jan 15 20192:12 PM EST