This hack really depends on your field and it’s a great way to increase engagement, digital publishing is one of the most profitable industries and this hack can create decent revenue. Offer your customers easy guidelines to problems they are struggling with, this is great for fitness, health, recipes, etc. Be the authority people are looking for, see this example by Moz who teaches SEO to people every Friday! Make sure to also publish your content as courses in outlets like SnapGuide, Guides.co, Quora, Wiki-how, Wikipedia, Lynda, Skillshare, etc. If you get enough positive feedback, you can start charging money.