Forget don’t have commercials after every chapter, they don’t have commercials in the middle of chapters. Think of a book being an entire TV show or just a single season of that show and each chapter being the episodes of that show. In a half hour show (which of course typically means a cartoon, a sitcom, certain reality shows, most cooking shows, and most game shows) you have like three or four commercials breaks. And in an hour long show twice that number. Imagine how many commercial breaks a twenty-six chapter book could have if there were commercial breaks in the chapters.