If you’re someone who is well trusted in the community or even well trusted to a single buyer/seller you can earn up to 0.5% of transaction’s total cost by becoming an escrow arbiter. 

To become a Syscoin Escrow Arbiter simply purchase a Syscoin Alias and publish it to the community. Escrows that you’re selected for will appear in the “Escrow” tab of your Syscoin wallet. You will not be paid unless your intervention is required, but in the situation it is required you will earn 0.5% of the total transaction value.