‘Diamond’ journals’ reliance on volunteers ‘unsustainable’

As the editor of a very long standing, University library-published diamond OA Journal in the social sciences, I can confirm that we have found Plan S compliance to be impossible. We have a budget of $0 and publish 60 articles a year, relying on voluntary labor. We therefore have no money to turn our articles into XML format, which is technically difficult for academic editors and time consuming, or to archive them according to Plan S specifications [LOCKSS etc.]. Our own gold standard is nicely formatted PDF articles, and 'archiving' is done by our university library, which seems more than safe enough. Nonetheless we are nicely ranked [top quartile in 3 disciplines] and well respected. The Plan S demands for machine readability and so-on are frankly unrealistic, as we said in this report's consultation survey. If Plan S, or the major funders, would like to give us some money to fulfill their technical expectations that would be acceptable. Otherwise we will continue to remain non-compliant.