> Like a volume key license being resold against EULA or some such.
replyAt least in the EU, this is legal.
Through which means?
replyI can only provide articles that are in German:
replyAn article about court decision by the EuGH from 2012:
https://www.heise.de/hintergrund/EuGH-Gebrauchte-Softwareliz...
Another court decision from the BGH (the highest German civil court) from 2014 that builds on this EuGH decision:
https://www.heise.de/news/BGH-begruendet-Rechtmaessigkeit-de...