Nobody can tell which online course is actually worth the money

Every course page shows a 4.7 rating and "50,000 students enrolled". None of them tell you the completion rate, how many people who finished got the outcome they wanted, or how out of date the material is.

Reviews are written in the first week, when everyone is still enthusiastic. The people who quit in week three do not leave reviews at all, which is exactly the signal a buyer needs.