Open access has many variants in the world of scholarly publishing. Our variant is called Subscribe to Open or S2O for short. S2O is presupposed on the willingness of the libraries that once subscribed to one or all of PJ Journals for their own library users. Under S2O, the previously subscribing libraries agree to continue paying a subscription-equivalent fee, but in an agreement with PJ, that their journals are made open access for scholars and others to use without payment. As a result of S2O, Pluto Journals usage took off, increasing six times over, on average, in the first few months of Open Access.