Another semi-fraudulent practice I've seen too often: find an H1B worker for a position you want to fill at a sub-US labor rate, then write a very specific job posting that perfectly fits that one H1B worker and no one else, and post the job only on the company website where no one will find it. Congratulations, you've just "proven" that you can't find an American worker to do this job, so you bring the H1B worker over as basically an indentured servant. In reality, there were plenty of American workers who could have and would have taken the role if it was represented properly and actually paid a competitive market salary.