What they did have was trust. So if a new immigrant got a visa call, and they came to the US, people in the community, distant cousins, close cousins, friends of friends would not hesitate to send $2k, $5k, $100, whatever they could to help them get their business started. Today, the same people send each other $100k+ to close deals without hesitation.
Obviously, no bank is going to lend to a no name immigrant. And they were not going to get fancy white collar jobs or even government jobs with broken English and no US degree.
I see the people in the article doing sort of the same. They are taking advantage of the trust between each other. Why let a bank or other investor take extra if you already have the inside scoop that this person is likely not a fraudster and has good work ethics?
The ones I know at least feel incredibly fortunate and lucky, know that the world is terribly unfair and that they essentially won the lottery. They put a lot of time and energy into helping others and now that they're comfortable they are making sure they're working on impactful projects.
Hard /s
It's a different financial strata than most live in these days, but to think of it as purchasing friendship is to misunderstand just how rich some people are, and how the bubble they live in operates.