The "publisher" takes all of the financial risk. That's part of the deal. I would never use a website that said "you pay us, but if you have payment problems, you have to take that up with the product manufacturer". The aggregator has to take enough off of the payment in order to insure their business, just like they have to take enough off of the payment in order to afford any of their other capital (salaries, utilities, rent, etc).
I'm assuming you have doubts about the practical feasibility of charging "that much". But it has, historically, been one of the best cost-to-compensation models ever created, with entire industries being built around enshrining an ever-more predatory pricing structure that funnels more and more of the product profit to a small council of investors.
I'm assuming you have doubts about the practical feasibility of charging "that much". But it has, historically, been one of the best cost-to-compensation models ever created, with entire industries being built around enshrining an ever-more predatory pricing structure that funnels more and more of the product profit to a small council of investors.