I posted, a short while ago, about the reprinting of OA books under CC licenses(https://eve.gd/2021/03/02/oa-books-being-reprinted-under-cc-by-license/). This is, of course, totally legal and allowed under the more liberal Creative Commons licenses. However, it will, I feel, alienate academics from OA. I think that they will consider it derogatory treatment of their work.
Martin Paul Eve (Wed,) studied this question.