What level are they? In their training.
Edit/continuation: and their slave level. Not their regular level.
They're the bare minimum level to be prostituted.
Well you need to up their level.
I haven't looked at the the code but I think their training skill level and their slave level should effect the RNG.
Oh and they will walk up to you to give you the credits. I'm still not sure completely how long they're gone for but I think they work for 24 hours.
