I think that this would be done for one reason only. To see if the money that the girls hands over corresponds with what happened in the room , if neccessary. I doubt that there was an ulterior motive for this. Just keeping checks on the business.
thats what i reckon anyway,
Westside.
PS i did get a feeling of cameras in rooms there. If they were making vids they should have told me. I charge a good bit.