I just attempted to look at the reviews.
There's an uncloseable pop-up telling you to log in.
Normally I wouldn't bother, but curiousity got the best of me - I logged in with my Google OAuth.
Not so fast - you haven't contributed to Glassdoor in the last 12 months, here's another annoying pop up and you cannot dismiss it until you do.
Does anyone actually bother to use this dark pattern infused service?