Yeah, exactly, and even though you're technically prohibited from excluding Americans in the job ads, take it from Cohen & Grigsby, there's plenty of ways around that problem:

https://www.youtube.com/watch?v=TCbFEgFajGU

They'll teach you how they assist employers in running classified ads with the goal of NOT finding any qualified American applicants.

You can thank them directly here: http://www.cohenlaw.com