More broadly: going from "I wouldn't buy that" to "That's commercially nonviable" is one of the classic hacker mistakes. Clearly people buy it, right? You can fail to sell to billions of people and still have a great business.
Which, I guess, points out another class of "actually reasonable" circumstance - the "no, really, it actually is that good" circumstance. I've heard similar things from people who bought top-end couture - you go in thinking "I can't imagine spending that much" and come out thinking "holy shit, I'm so glad I decided to spend that comparatively small sum of money".
No, he paid for "a weekly 5 minute video series."
Marketing is everything.
Even then, what's the issue? Just because something is available free if you search hard enough for it doesn't mean the creator can't or shouldn't charge for it.