This presentation will review an open access model currently being piloted by Berghahn Books and Libraria, as well as by Annual Reviews, that is aimed at utilizing existing structures to move subscription journals to open access. It will describe how, in these two cases, a for-profit and nonprofit publisher issuing renewal notices to subscribing libraries asking them to subscribe-to-open for 2020 and going forward at a little more or less than the current subscription rate. The talk will present the measures of success, the reversibility of the model, the role of third-party agents, back issues, pricing, existing open access journals, and the funder role.