If you have something valuable, don’t give it all at once in exchange of nothing

GlassDoor (like a TripAdvisor for HR) provides free lifetime accounts in exchange for content that can make their site grow. Who would pay a monthly fee for a service when you can get it for free in exchange for some lines explaining your last job experience? As you might imagine this is not the main way where they get their dollars, but that’s coming from providing paid services to those companies that get worse reviews in their platform.