It is the giant digital debate of the next decade: how to manage the explosive emergence of online platforms. Until recently, governments around the globe allowed and encouraged the unfettered growth of online marketplaces such as Alibaba and eBay, social networks such as Facebook and YouTube, service providers such as Uber and Airbnb, and Apple and Android mobile phone app stores. They believed – correctly – that these platforms allow unprecedented access to information, new goods and services. Suddenly, small businesses are able to reach global markets, consumer choice is broadened and civic participation increased. What a boon for sustainability!