It’s used primarily as cargo culting and also as a way of suppressing salaries. Big tech and other companies use it to keep H1B candidates from easily switching

It’s used primarily as cargo culting and also as a way of suppressing salaries. Big tech and other companies use it to keep H1B candidates from easily switching jobs and having to do indentured servitude in hostile work environments. That’s all it is - along with the entire industry being massively overqualified as a whole and needing a way to cull the recruiting pipeline to only the most desperate. (People on visas)