I think it's also an error to assume this really has any bearing on what Charlie was talking about. This gets into the "I once dove to the bottom of the ocean a

I think it's also an error to assume this really has any bearing on what Charlie was talking about. This gets into the "I once dove to the bottom of the ocean and brought back a pretty shell, so that's a viable place to open a curio shop" fallacy. The fact that a subset of readers will buy a few more books than they'll read doesn't mean that books are ultimately non-rival goods. Unless there are a large number of potential consumers with effectively unlimited willingness to buy books, the pie is still very much fixed in size despite a couple of pieces being very slightly bigger than others.