This new version has updates from the one you posted at https://news.ycombinator.com/item?id=9162482 https://news.ycombinator.com/item?id=9162482: > I heard ba

This new version has updates from the one you posted at https://news.ycombinator.com/item?id=9162482 https://news.ycombinator.com/item?id=9162482: > I heard back from Didier (the corresponding author) yesterday. He does not know why Elsevier are selling his article, nor did he give them permission to. This clears up the problem with the original text, which was the possibility that the authors had allowed Elsevier to profit on the work. The other link doesn't have the updates.