https://www.uscis.gov/tools/reports-and-studies/h-1b-employe...
Since h1b is a lottery system, these companies flooding the system with their applicants at lower salaries was directly impacting the chances of employees at other companies. I anecdotally knew a coworker at a FAANG who failed to get his h1b consecutively for two years in a row, with his OPT expiring the next. Looking at the data from the latest year though, it seemed as if they had already started addressing the problem.