One of these is the way in which auction houses use third-party guarantees, where an outside individual or company agrees in advance to pay a set amount for a work sold at auction, in return for a cut of proceeds if the consignment sells for more than that.
What makes it tougher is that unlike newsletters, which collect subscription money in advance and then pay the printer's bills over the course of a year, Vulcan pays for printing upfront and then collects from advertisers and distributors.