How many of the authors would license their book for endless creation of derivative works for that amount?
Authors cant simply license away fair use. If it could be dismissed so easily the right wouldn't exist.
Do you want this to work any other way? I constantly see people in the AI debate working themselves into wildly copyright maximalist positions. I actually don't think that we should give every author veto power over a book review!
If you are selling more than 100 books you are clearly losing out