The Succubi are forever popular way past their actual value - which is very good, because we can turn profit on them. We only need to brainwash them a little in a VooDoo facility (takes a lot of Runt hours), use some Glamour to properly bond them to our societal norms, provide them with a Magitech choker as a final safeguard, and voila, we have a perfect hoe/dancer/barmaid/whatever who will earn us $69k monthly. Succubus Servants do occupy prison space, so we have to plan accordingly.