Why does everyone hate AirBnb but love the App Store? How can VISA own much of the retail transaction system while doing almost nothing for the customer?

This video is the the first of a short series on the fundamentals of technology strategy. I cover the basics of what a 2-sided market is, why a platform sits in the middle of a two sided market and how the basic economic principles of network effects and economies of scale contribute to the profitability of [successful] platforms.