The European open access coalition, which promotes free-to-read Plan S, is commissioning a journal checker so researchers can check which journals publish OA

But for-profit publisher Elsevier promotes its own service, Journal Finder, “not sure if the journal you want to publish is open access? You can easily identify open access journals … ” As long, that is as they are journals published by Elsevier. “Elsevier Journal Finder uses smart search technology and field-of-research specific vocabularies to match your article to Elsevier journals.”

It rather goes to the heart of the argument.