In this day of age you very rarely need to be permanently physically present in the US to own and run a US business, and once your business passes the threshold of actually being viable theres multiple routes to getting a Visa.
There's the whole E2 Visa system specifically designed for this. In addition after a year in business there is a L1a route too, assuming the business goes anywhere.
Admittedly theres very little room for a "starving devpreneur who is making some social app that doesn't make any money", but assuming such an app can take off then the investment they could raise would instantly get them to quality for a visa too.
In this day of age you very rarely need to be permanently physically present in the US to own and run a US business, and once your business passes the threshold of actually being viable theres multiple routes to getting a Visa.
There's the whole E2 Visa system specifically designed for this. In addition after a year in business there is a L1a route too, assuming the business goes anywhere.
Admittedly theres very little room for a "starving devpreneur who is making some social app that doesn't make any money", but assuming such an app can take off then the investment they could raise would instantly get them to quality for a visa too.