You bring up an important distinction. I'd like to coin a term: externality arbitrage. Although an individual might be able to extract value, as you point out,

You bring up an important distinction. I'd like to coin a term: externality arbitrage. Although an individual might be able to extract value, as you point out, the scale would be small. A business, especially a VC-funded one, is much more likely to be able to scale this on a massive level, across many markets.