Am I missing something?
These are Glassdoor reviews.
Glassdoor is not, in any way, proof of anything. There is no employee verification system. Anyone can write anything. They don't verify the employment status. Most reviews are either 1s or 5s, which let's be honest, is usually bullshit either way. There is also nothing stopping the same person from leaving more than one review.
For all you know, the same person could've written the three reviews that are in this very thread.
Glassdoor can give you an idea of a company but it's in no way reliable, especially not about a company embroiled in a huge controversy.
Employers can dispute a review, at which point it goes through a manual verification process with Glassdoor, they will contact the person who posted the review and will ask for proof in the form of employee badges, payslips, contracts etc.
It does require someone to start a dispute process, they also do some additional checks and cross reference your email address and social network profile.
It doesn't mean that every review is truthful and that every review is from a real employee but overall Glassdoor has improved their process considerably over the past years and now actually handles disputes with human arbitration and verification.