I took some Tai Lopez courses. A friend lend me her login credentials. I ripped the courses. I learned a lot of marketing with that guy's content. Also, I use the ripped courses to reverse engineer Tai's sales techniques (using a little of my prior knowledge of semiotics, teaching and marketing). I think it was worth the time, as I am much better marketer after his courses. Also, I know not everyone approach this kind of courses as I do + there are A LOT of scammers out there that just regurgitate other peoples knowledge + this people like Tai Lopez doesn't teach you everything they know as key portions of knowledge are kept hidden as a business strategy to continue to sell you courses.