There's something I've noticed about Udemy (an online school with courses on almost any topic you can think of), and it's that there are people offering free courses there to build a "list" they can pitch later sending offers for paid courses. It's the classic list building strategy: offer a freebie so people sign up with you and then send emails offering your products and services. I think it's brilliant because a free online course is something everyone wants. It's true that it's harder to produce than a 30 pages report but it's also perceived as being more valuable so I think it's a pretty effective to build your lists. What do you think? Would it be worth the time to offer a free course at Udemy?