In the Akata Witch series by Nnedi Okorafor, Leopard People (mages, in essence) receive chittim, a form of currency, when they reach some type of realization, acquire new knowledge or experience, and so forth. These tokens appear essentially from thin air and are used as a medium of exchange by Leopard People.
Who or what is the source of the chittim? A masquerade, a natural process, some sort of ancient juju or other magical working? Something else?