There's a lot of reliance on people's basic inabilities to do math.
My mother-in-law wanted us to go with her to a seminar hosted/ sponsored/ affiliated with one of the house flippers on TV.
They of course talked about their course on how to do it.
And they talked about how "nearly 8,000 people have done this!" and that if you did, too, you'd have access to their financing which, "has given our members over $100M to buy houses to flip! Some of them have flipped 20+ homes with us!" Cue oohs and ahhs.
Because $100M seems a lot. Until you're talking houses. Because in most areas in the country, even a workable flipper house is still going to be $100K, at a minimum. And $100M only buys you 1,000 houses.
Hmm. 8,000 people have paid $5,999 to do your course. And you've flipped 1,000 houses, some people doing 20+ each. That means that realistically, less than one-in-ten of the people who paid for your course ever flip a house.
So yeah, they made a not shabby amount on the costs and interests of those loans...
... and $48M "teaching" people to get rich by flipping homes.