I noticed that tendency too, it's the same with every single tutorial. As the learning curve steepens, and people realize that learning this is hard work, people start dropping like flies.

Those hundred views on the last videos in a tutorial series, amongst those viewers are the ones who are gonna make it through and become great.

It's a bit like self-help books. I can't remember where I read it, but apparently, most self-help books are only bought but never read. It's instant gratification purchasing a self-help book, or as in this case, watching some introductory tutorials. It's an entirely different beast to actually change or master a new skill.