Fakespot needs to get into the Glassdoor game. They already analyze Yelp.
Some companies are just not subtle about their reviews, just like on Yelp. You will see a flurry of positive reviews posted within days from each other. Or some have straight marketing talk.
I do find it interesting that some of the worst companies I have worked for have been averages than some of the good ones, but I guess that is the point of the article. These bad companies need to boost their ratings since they are bad.