First, the rapid growth of platforms has created new types of certifiers. For example, platforms can certify that small businesses selling through the platforms are legitimate legal entitles, while users can rank products or services, such as through hotel and restaurant ratings on TripAdvisor. Second, new products and services, such as drones, self-driving cars and internet-based financial services, are emerging so rapidly that regulators and traditional quality infrastructure can be caught unprepared.