I don't know what Sama's plan is but it doesn't scale very well. If you plan to fund thousands of promising startups, I don't know if you would want to bring them all to the US. The biggest reason for that for the first few years startups succeed more in one geographical region (as in one industry industry segment and one customer profile) and asking them to move might not be the best of idea. It will work for some but will destroy some other promising companies.