“The magic of network effects is that they generate a positive feedback loop that results in superlinear growth and value creation. This superlinear effect makes it very difficult for any node in the network to switch from an incumbent to an alternative (“customer lock-in”), since it is almost impossible for any new entrant to match the value of plugging into the existing network. (Nodes in these networks are typically customers or users, as in the canonical example of the fax machine, or the more recent example of Facebook, but can also be data elements or other fundamental assets valuable in a business.)”