Those you are posting look like they could be violations. But if you just visit your link, you quickly see that most jobs are in line with median salaries in the bay area.
For example:
https://www.indeed.com/career/software-engineer/salaries/San...
And then:
https://h1bdata.info/index.php?em=zoom+video+communications+...
Those are pretty close to the median in aggregate.