I do get that $100,000 in expensive parts of silicon valley likely will buy you a room, some food and commute to work, but math dont make sense here.

Person from that kind of country likely had to spend $100,000 just to find job and move to US and survive there for the first time.

Legal migration to US is super hard and super expensive. You have to be both very successful in what you do and very dedicated in order to do it. Or very rich. And it take years.

People who choose to migrate to US and manage to do it isnt the type to throw it away on small scam.