just a point of info :> DAZ3D the company does NOT actually author any textures or content products, so they HAVE NOT got texture filtering wrong. the same people who make textures for Poser make them for use in DazStudio as well, the only difference is in the shader set-up. the textures ( .jpeg, .png etc) are identical.
so please don't blame a particular marketplace for the perceived shortcomings of content author/producers.
quite often the same content is sold at  various market places, and it is rather unfair to point the finger at only one.