If I understand correctly they are ruling you can by a book once, and redistribute the information to as many people you want without consequences. Aka 1 student should be able to buy a textbook and redistribute it to all other students for free. (Yet the rules only work for companies apparently, as the students would still be committing a crime)
Well, it would be interesting if this case would be used as precedence in a case invonving a single student that do the same thing. But you are right
A supposed opt-out