There may still be truth in it. People make money on Steemit for example. I bought a plane ticket with Bitcoin. I have been making money with Bitcoin, STEEM. I may try Udemy as well. How much money people may or may not make depends on a lot of factors, but some people are making some money and some people are making a lot of money and we all can play the game of life and we can choose to learn and teach and share and live and life is full of risks for better and for worse.