>I've found does actually require the existence of a monopoly. Monopoly is defined loosely and based on the idea of market power, not being a sole provider. Th

>I've found does actually require the existence of a monopoly. Monopoly is defined loosely and based on the idea of market power, not being a sole provider. The Wikipedia article you cite even mentions Microsoft and Intel as examples, and they had less market power over their fields than Facebook does.