I feel like thats one of the many questions regulators and law makers are going to be asked long term. I'm sure buying the book for "commercial purposes" like that would't be appropriate, but then again, does that mean if I read it and then summarize it in my work, or regurgitate its info as part of my job...I'm violating a license?

A world where humans have special permissions but LLMs don't seems pretty interesting to consider, especially if they're both doing the same kind of things with the data.