Is it open access if registration is required to obtain scientific content?

Abstract

Some journals require users to register before accessing a scientific paper, despite labelling that content as open access (OA) and free-of-charge. We refer to such cases as members-only OA (MOOA), which we contend is not ‘free’ since users are forced to ‘pay’ with personal data. Scholarly content may be accessible via MOOA to either the in-browser text (HTML) or to the archival-friendly version (PDF), or both. We suggest a four-tier typology to capture the degree of openness based on this observation. We believe that technical guidelines of OA implementation should not permit MOOA.