Strategy Page on the use of slavery to provide tangible rewards to faithful Muslim warriors of the new Caliphate:
Although ISIL (Islamic State in Iraq and the Levant) publicized an auction for slaves (captured non-Moslem women and children) in June they have since replaced that with a printed price list. Young children are the most expensive going for up to $200 each. Adolescent girls cost about $125 and adult women go for under a hundred dollars. The catch here is the buyers are restricted to ISIL gunmen, as something of a fringe benefit. The sales are made with the understanding that the buyer can resell their slave for whatever they can get. It is also understood that ISIL slave owners can try to arrange for families to ransom the slaves for whatever the owner can get (usually several thousand dollars each). The June 2015 slave auction in eastern Syria sold 42 Yazidi women who were offered to ISIL men for between $500 and $2,000. So being allowed to buy a slave is quite a lucrative fringe benefit.
Since the slaves were not Moslem they could not be married so their owners would use them for sex, housekeeping or whatever. ISIL was depending on Moslem scripture to justify this. Actually, ISIL is not alone as there is still a lot of slavery in the Islamic world. There is also a lot of hatred for non-Moslems especially those considered pagans. ISIL considers the Yazidis pagans but will enslave Christians as well. It was with Yazidis that ISIL reintroduced slavery (of non-Moslems, especially “pagans” like Yazidis) into their new Islamic State. This may appall many in the West and to placate foreigners most Arab nations have outlawed slavery, despite the fact that it still exists and continues to exist with much local support.
For example in northeast Nigeria a local Islamic terror group, Boko Haram, revived slavery in 2014. Boko Haram, which considers themselves devout religious reformers, consider slaving justified by Islamic law. Yet the Boko Haram revival of slaving resonates deeply in northern and central Nigeria. Northeastern Nigeria was once the center of an empire that grew rich by enslaving other Africans and selling them to Arab traders who transported the slaves to Arabia. This trade continued until the British colonial government suppressed it in the 19th century. Bitter memories linger and the Boko Haram slaving opened an old wound.