Grab 3d model from papercraft-maker.com

I hope my question not too redundant. is it possible to rip 3d model from papercraft-maker.com? papercraft-maker is a place where you upload your 3d model and be unfolded just like pepakura. I did try to watch the Network but only get PMX. I did try using mdd add-ons on blender to read the file but no avail. Is it possible to get any? You can export as .GLTF but only for premium user.