> What is the benefit to the person, or to the US?

Not that I encourage it but... Obviously an OF model moving to the US means US users viewing that person now stop sending money abroad. And people from all over the world watching that model now send money to the US.

It's not just tax revenues: it's shifting the balance of money in the US's favor. If an OF model makes $10m a year and pays $2m in taxes, it's not just $2m in tax revenues for the US: it's also in addition to that $8m that are now spent/staying in the US.