I know some people that made tons of money simply for setting up the arbitrage, shell companies that would sell ad space to big brands promising top tier media

I know some people that made tons of money simply for setting up the arbitrage, shell companies that would sell ad space to big brands promising top tier media orgs and then turn around and buy it directly from porn, gaming and piracy sites. Same thing as this article, but without actually building the technology themselves, simply being the middleman.