[maverickJ]

>I can't wrap my mind around why would anyone pay for what are you doing, let alone so many people

Your mental model of the world is not the mental model everyone has of the world. Your quoted sentence above comes from the result on one thinking their way of the world is the only way. This is surprisingly common in a number of intelligent people. The result of this is that it prevents them from creating products.

One person might pay because the course provides a structured way to learn a topiC. Another person might pay because by paying, they are more likely to learn the subject.