Re: They admitted to it...
It doesn't need to scale well - most traders will commit these "special trades" with counterparties known to them personally not just any old spod in the market. When you're dealing with traders in certain markets that can deal in size and/or have a greater freedom to trade you're down to a limited set of individuals. Whilst markets seem large most players know each other - you'd be surprised.
Biting the hand that feeds IT
