Network Effects

Network effects — the property that a product’s value to each user rises as more users join — is one of the most heavily-trafficked moat concepts in Kyle’s corpus, and several sources he reads treat it with notable skepticism about overuse. Metcalfe’s Law is the recurring lens: in The Idea Factory the Picturephone’s failure is framed explicitly through Metcalfe, where a minuscule network had vanishingly small per-user value, and in The Founders Bill Harris invokes Metcalfe’s Law to argue that “true networks are a naturally monopolistic business.” The Power Law — Venture Capital & the Making of the New Future applies the same law to eBay and Yahoo, and casts VCs themselves as relentless network-cultivators (the Saxenian “weak ties” thread) — while puncturing WeWork, whose “alleged network effects were weak, at best” (adding tenants on Park Avenue doesn’t improve the Fifth Avenue experience).

The skeptical thread is sharpest in The Mysteries of an Economic Engine - Research, drawing on Bill Gurley’s “All Revenue is Not Created Equal”: network effects are “perhaps the strongest moat of all,” but “discussed way more than they exist” — many supposed network effects are merely economies of scale, far weaker; the key variable is the decay rate of value of the incremental user; and genuine strong-form network-effect companies (Microsoft, eBay, Skype, Google AdWords, Facebook in their prime) are rare, and when they exist are leading 10X-revenue candidates. The concept also appears in its growth-tactics form in Product Led Growth — The End User Era (viral products like Calendly “targeting consumers inside an enterprise”), in Working in Public as open-source’s “cornucopia of the commons,” in the Todd McKinnon — Creating and Defining a New Market Category interview (Okta’s standard-setting ambition resting on network effects and positive returns to scale), and in Oh Snap, It’s Here (why a generationally-bounded network is invisible to those outside it).

Context: A network effect exists when each additional user increases the value of a product for existing users — direct (telephones, social networks) or indirect (marketplaces, app-store platforms). Metcalfe’s Law, the canonical formalization, holds that a network’s value scales roughly with the square of the number of connected users.

Where this appears

• The Idea Factory — the Picturephone’s failure framed via Metcalfe’s Law; a small network has vanishingly small per-user value.
• The Founders — Bill Harris invokes Metcalfe; “true networks are a naturally monopolistic business.”
• The Power Law — Venture Capital & the Making of the New Future — drives eBay/Yahoo; VCs as network-cultivators; WeWork’s network effects exposed as “weak, at best.”
• The Mysteries of an Economic Engine - Research — the skeptical core (via Gurley): the strongest moat, but “discussed way more than [it] exist[s]”; decay rate of the incremental user is the key.
• Product Led Growth — The End User Era — viral/network products like Calendly as “consumers inside an enterprise.”
• Working in Public — open-source’s “cornucopia of the commons.”
• Todd McKinnon — Creating and Defining a New Market Category — Okta’s standard-setting ambition rests on network effects and positive returns to scale.
• Oh Snap, It’s Here — why a generationally-bounded network is invisible from outside it.