The parent comment asks whether an “engine” trained on copyrighted data is entitled to decide profit. Your comment is about a human receiving knowledge that facilitates profit. Of course, these are legally independent scenarios.

Take a college student who scans all her textbooks, relying on fair use. If she is the only user, is she obligated to pay a premium for mining?

What about the scenario in which she sells that engine to other book owners? What if they only owned the book a short time in school?