I'm at a conference where a company is presenting a product with "open" content.
Very generous, but the content is mainly "adapted" from CC-BY licensed material from openstax.org, but they've put a CC-BY-NC-SA licence on it. Is that allowed?
In reply to @christianp
Since the value the company is adding seems to consist of the automatic marking and LMS interoperability software, which isn't open, what have they added that allows them to put a different licence on the material?