Well, I'm glad Rosamund cared because I sure as shit didn't.
Classic sell your soul to the devil for riches tale, done in a flash bang wallop way, that races to a stop midway through the second act when you realise that none of the (remaining) characters are even remotely interesting, redeemable or, ironically, worthy of your care.
Supposed to be a sharp satirical shot at capitalism, it's more of a blunt laudation of cuntery.