Most researchers will think about this for about 2 seconds and then publish in the journal with the most prestige and highest impact factor that they can. Publishing in high impact journals is a major factor in promotion and tenure for professors, so until universities adapt their policies on promotion and tenure, professors will continue to published in prestigious and expensive closed access journals. When reviewing someone for promotion or tenure, high-level administrators don't have time to read all the journal articles a professor has published, so they really heavily on g-indices and/or h-indices that are based upon journal impact factor scores.