Diamond Open Access journals are free for all to read, without subscription, do not charge article processing fees to authors, and authors retain the copyright of their work.
“Subscribe to Open” (S2O) is a pragmatic approach for converting subscription journals to open access—free and immediate online availability of research—without reliance on either article processing charges (APCs) or altruism.
S2O relies on existing library subscription procurement processes. The model provides a realistic and immediate route to opening a vast body of research output that would otherwise remain gated.