I tried not to confuse them, but don't seem to have done a good job. You are correct, the non-redistributability of many O'Reilly books is what they would they

I tried not to confuse them, but don't seem to have done a good job. You are correct, the non-redistributability of many O'Reilly books is what they would they would object to, not cost. And not all O'Reilly books are non-redistributable - they have a number of books under open licenses.