Ross Mounce, a postdoc at the University of Bath, recently wrote about how Elsevier charged him $31.50 for an “open access” research article licensed under a Creative Commons Attribution-NonCommercial-NoDerivs (BY-NC-ND) license. Mounce was understandably upset, because the article was originally published by another publisher – John Wiley  – and was made available freely on their…