It's quite simple.
If you install a pack on the cracked version and there is no watermark, that does not mean that there will not be one with the same pack on the official version.
Sometimes, you can do an FBX export from the cracked version and recover the export under DAZ or MAYA and re-export it to CC4, but not always.
The best is to only download the packs for legitimate or cracked versions (like on Kingdom 3d).