I agree that a stronger presence outside the big 8 countries is important. Hence why we invited Italy, Argentina, Japan, and Fiji to major tournaments every year.
And the USA offers a potential for growth. But so does Spain. And Romania. And Georgia. And Canada. And Uruguay. And Chile. And Portugal.
Which tbh I'd invest in any of those before the USA today. Finals weekend for the Nations cup in Madrid anyone? Bucharest? Santiago? Toronto?