The comments seem interesting here: https://superhivemarket.com/products/globalskin-ultimate-skin-shader/ratings

It seems to me that, if they have something that works in Blender Cycles, getting those shaders to work in Poser is a smaller job than getting them to work in the range of software they already support. You could ask them. But they might not feel that it's worth the time to learn Poser Python to support the platform. Someone who is already good with Poser Python might approach them about collaborating.