In some areas, like game development/art there’s no quantitative way to test someone’s skills. When you look at the things they test it’s really dumb things like the name and locations of UI elements. In the Unity certification they even have a thing about explaining the value of the Unity asset store. The only thing that can really test someone’s skills is looking at the person’s work and the amount of time they put into it.
I don’t know of any place that values these types of certifications. At best, the value is tricking someone that doesn’t know any better.