Originally Posted by taustin
How is that in any way relevant to the vast majority of books publishing, which is fiction for recreational reading? Do you propose some system by which you can force someone to do "mandatory excercises" when they buy a trashy romance novel? If not, then maybe you could try to come up with something relevant to the real world.
If you read more carefully you see that is was an answer to a specific question. Maybe you try to read better to come up with more relevant posts.