There are few people that i know who never did the business at Amazon or dropshipping, but they are making money by making and selling the courses on these things. Similarly there are people who do not know the ABC of trading but they are making money by running a crypto signal group, providing useless signals to the masses and earning money from the subscription fee.
The same guys that sell books on how to win the lottery, instead of making 10 millions a month by winning those they try to make $10 000 a year by selling a few books, wonder why? Probably because all those are pure bs and writing is easier than practice?
Take Kiyosaki for example, renown author, quoted every day but in real life he has gone bankruptcy after bankruptcy, lawsuit after lawsuit, he has never had a profitable business in his life but he's good at writing fantasy novels, cause those have nothing real in them.
If the “accurate” signals can't work for him, then why is he selling them?
Ask this the guy who just yesterday was selling a 101% formula to win millions in a casino for $200.