I have paid for two blogging courses. I followed the first one for about a month until it became evident they were more interested in selling more advanced courses and resources than it just teaching me how to make money blogging. Again, it was about blogging, start newsletter, sell products you make to teach others to do likewise.
The second course was recommended by many people I knew from a site we had all written on before it closed. I knew they were honest and the course was helping them make money. So I bought it from one of their affiliate links, started to apply what I was learning, and began to earn more myself. But I made the most money from affiliate commissions for their courses.