The Cold Start Problem: Using Network Effects to Scale Your Product
The Growth Equation: How Early Stage Startups Can Build a Powerful Engine for Growth
amazon.com
First, does the product have a network? Does it connect people with each other, whether for commerce, collaboration, communication, or something else at the core of the experience? And second, does the ability to attract new users, or to become stickier, or to monetize, become even stronger as its network grows larger?
Andrew Chen • The Cold Start Problem by Andrew Chen
they have network effects so that their products become useful as more people use them.