How many users does your network need before the product experience becomes good? The way to answer this is for companies to do an analysis on the size of their networks (on the X-axis) plotted against a set of important engagement metrics (on the Y-axis). For Uber, this chart showed that more drivers generally meant a lower waiting time, and thus more users—at least up to some point. Eventually, the difference between two minutes to get a car or one minute to get a car becomes diminishing returns. Facebook’s famous growth maxim, “10 friends in 7 days,” is an expression of the same idea.
