Does the STBC buy slaves or are can slaves simply be sent there? Could a slave with Fae blood be kept there? Could the Vampires sate themselves with little drinks instead of draining him all at once? If not, where would a part-Fae slave who is presently un-owned go?
Also the info says that xcessive use of photokinesis can drain a part-Fae of their inherent magic. Is this permanent? Or is it only temporary while the Fae 're-charges'?