The paradox lies in the “price‑anchor moat”: a low price can lock customers into a product ecosystem so tightly that competitors cannot win them back even after prices rise. By offering a rock‑bottom entry tier, a firm creates high switching costs through data lock‑in, habit formation, and network externalities.

Customers accrue value from the community and their own usage history, making the cheap plan a gateway rather than a discount. When the company later introduces a premium tier with richer features, the original users are already primed to upgrade because abandoning the platform would mean losing accumulated benefits.

This dynamic was starkly illustrated when a cloud‑storage provider introduced a free tier that attracted millions of small businesses; years later, those same firms paid substantially for enterprise‑grade security and compliance add‑ons, a revenue stream the provider could not have captured without the initial low‑price hook. The moat persists because rivals must either match the low entry price—eroding their margins—or forgo the network effect that the incumbent now commands.