Opening texture files from C:\Users\<username>\AppData\Local\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\premium_cache\skin_packs results in any image editor being unable to open them.
json files are displayed as garbage text. How is Minecraft able to process them?
Obviously items downloaded from Minecraft store are encrypted, so they can't be copied and distributed outside the store.