The best evidence for the strong defensibility of Physical Networks is that so many of them have poor or substandard services, and yet continue to lead the market. Think of Comcast and Verizon. Why do they have the lowest customer satisfaction in the US? Because …The Network Effects Manual: 13 Different Network Effects (and counting)2.6K12NFXAdam Dorfman | CEO at TAPFollowSep 5, 2018 · 1 min readthat’s because the internal data is centralized, that’s one of the big monopolies.