Speaking of COPIM, here's Martin Eve on a novel OA model that Central European University Press (CEUP) is piloting:
CEUP is creating a sustainable OA publishing model that will give members access to a selection of the extensive backlist, DRM-free and with perpetual access after three years. In return, this membership revenue will then be used to make newly-published books openly accessible to anyone. When the revenue target is met and the entire monograph frontlist is openly accessible, future membership fee rates can be lowered.
It's a brilliant idea, reminiscent of the creative funding models that Eve has pioneered at Open Library of Humanities. CEUP will work with COPIM to roll out the initiative, dubbed "Opening the Future"—with the support of LYRASIS, OAPEN, and book hosting from Project MUSE.
An interesting twist is that CEUP's executive chair is none other than Frances Pinter, the Knowledge Unlatched founder who (around the same time as Eve, in the early 2010s) helped pioneer library-support schemes for OA. Pinter had co-founded CEUP 30 years ago.