There is perhaps no greater example of how lucrative the sharing economy can be than Airbnb. In the six years since its launch the website that lets anyone rent out their homes has propelled its founders—Brian Chesky, Nathan Blecharczyk, and Joe Gebbia—onto this year’s Forbes billionaires list with estimated fortunes of $1.9 billion each. That’s to say nothing of the company’s rumored $20 billion valuation, partly due to the fact that Airbnb now has over one million listings in 190 countries.