a. The muscular morphs only just came out so most people wouldn't have had them before anything that made it to the store was released. b. The magnet sets that help the clothing creators with getting the morphs into the clothes haven't updated the sets. c. They only include a few morphs normally since the files become unmanageable with all of them. d. They would have to charge a lot more to get their time investment back. Just pointing out a few things to think about that I have heard from various merchants.