If the founders are working in their own company, contributing to the local economy, is this really a problem for the U.S?
This will, therefore, probably mean a deluge of applications from across the globe and the consequent generation of several more US jobs (which works out great for everyone).
Only I'm not too sure we should then call it a 'Startup' Visa.
As it happens the owner currently spends the winter there (in Florida) on a three month tourist visa waiver - I suppose having a startup visa might make getting through immigration faster. He has a house, yacht and private plane parked there as well but ironically couldn't get a US cell phone because he didn't have a SSN