Summoned, he comes.
Ah, Cheliax. He adores Cheliax. The contracts are on the bare minimum side of what'll work under Law, and the Chelish take them anyways because they've been indoctrinated to believe that they're going to Hell anyways. And they're not even wrong, but a slave who can't escape is so much more valuable as a slave, and the contract isn't worth but a fraction of that increase in value, for the sort of soul that Cheliax sends to sign. They've been given a rather selective history of contracts with devils, and they believe they're doing relatively well for themselves as negotiators. Devils fight and maim each other for the privilege, to be summoned as contract devils in Cheliax, because the taste of it is so very very sweet.