They did that too. Actually they didn't even claim "we can't find anybody" up front: they'd just hire people and if they happened to be H1B let the lawyers deal with it. They didn't even bother with the fake job postings.
One of my coworkers was on H1B and switched jobs within the company, and the new job description said "X years experience with Y" and years after he'd been doing this new job the lawyers came back with "but your resume says you're 3 months short of X years", so he was scrambling to get an advisor from his university to write a letter saying he had done Y for more than 3 months to make up the difference.
They did that too. Actually they didn't even claim "we can't find anybody" up front: they'd just hire people and if they happened to be H1B let the lawyers deal with it. They didn't even bother with the fake job postings.
One of my coworkers was on H1B and switched jobs within the company, and the new job description said "X years experience with Y" and years after he'd been doing this new job the lawyers came back with "but your resume says you're 3 months short of X years", so he was scrambling to get an advisor from his university to write a letter saying he had done Y for more than 3 months to make up the difference.