I don't think it's uniquely Fanatics. All kinds of "luxury" brands have been dropping their quality standards for several decades now. And not for making some mass market cheaper products, but on their regular supposedly "luxury" lines.
But as the Frankfurt School
Famously said about the Mona Lisa that the copies make the original. In other words the copies give the original all the publicity to make it famous.
They said that, but it was already quite famous for centuries. As were other paintings, not copied, and not involved in some high publicity heist like it.