http://hn.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion/stories/38506460
If someone creates instructional content that provides thousands of dollars in value, they can sell videos for $200+, but a book version is hard to sell over $50, even if both provide the same value. Even for free content it is easier to monetize YouTube than it is to monetize a blog.