We do not charge a fee on top of how much it costs us to get an asset. What happens in practice is that we maintain buffers and as accurate a depiction of the Supercharger assets (simulated) in the real world as we can. We keep things over collateralised and use opportunities to work to increase that over capitalization to cover various risk factors.

In addition, "settlement" happens, so if one user wanted some gold and had BTC and another user had BTC and wanted some gold, we can essentially settle out the bulk of the transaction without incurring asset conversion costs. As we do this, we reconcile and any profits made are split 80:20 as per the other fee structures.