Platform Capitalism
Owning the layer where commerce happens, not the commerce.
Kernel
Platform capitalism is the dominant late-Silicon-Valley business model: build a marketplace, network effect, or aggregator, and extract rent from every transaction that occurs in it. Facebook, Google, Apple, Amazon, Uber, and Airbnb are the canonical platforms. The model's strength — extreme operating leverage — and its weakness — perceived illegitimacy of the rents — define most of the 2020s regulatory landscape.
Origins
Google's AdWords (2000) is the prototype: it does not produce content, it taxes the commerce that happens on the content layer. Facebook (2004) and the iPhone App Store (2008) extend the model to identity and software distribution. Aggregation theory (Ben Thompson, 2015) names the pattern.
Doctrine
Demand-side network effects produce monopolies. Monopolies are good (Thiel) for the monopolist. Owning the relationship with the user means commoditizing your suppliers. The take rate is the dependent variable; market power is the independent variable. "Be the only game in town" is the strategy.
Lineage
Google AdWords → Facebook → App Store → Uber → Stripe → Shopify → Substack → AI platform layer (OpenAI's GPT Store, Anthropic's Claude Code marketplace). Each generation moves up the stack to whatever the new commerce layer is.
Conflicts
Antitrust regulators (EU DMA, U.S. DOJ vs. Apple) try to break the take rate. Open-protocol challengers (ActivityPub, Nostr, Farcaster, MCP) try to make the platform layer commoditized. Sovereign-AI initiatives try to ensure that the next platform is owned by a state rather than a U.S. corporation.
Trajectory
The AI agent era opens a new platform layer — the agent-to-agent commerce surface — that no incumbent yet dominates. Whoever owns the x402 facilitator, the MCP marketplace, and the agent identity layer in 2027–2028 is the next platform giant. The race is on; the participants are mostly the existing platforms.