It's the same business model as the Better Business Bureau and Yelp. It's a manufactured perspective.
As a devil's advocate, how can a company expect to be viewed impartially if the only folks who review them have tempers raged enough to motivate them to leave a poor review in the first place? How can I, a potential employee, trust said-reviewer wasn't let go due to Silo'd mismanagement, personal issues or a company pivoting?
I'd rather a platform that lays out exactly what the working conditions would be for most folks. Time in/out of office, salary merit increases or profit-sharing, draconian work-attire policy, etc.