Different owners, maybe? Judy is based on Posette, which was made by DAZ. (Or the company DAZ was back then.) DAZ is pretty laid back about redistributing their meshes. They get a lot of grief, but really, as long as you RTEncode it, they don't mind. They (quite rightly, IMO) believe that community support is the key to success. They know they could never adequately support their figures on their own.

Jessi and James are apparently entirely new meshes, created by a Japanese modeller. Perhaps he doesn't want people messing with them, or CL doesn't.

Maybe someone could ask CL? It would be a real waste of time to re-rig Jessi if re-distributing her won't be allowed.