Though i dont understand what you mean by cosmic commission, but if you mean Gas cost on ethereum  blockchain, then i will say that as long as you keep transaction on the ethereum blockchain , then paying the high gas cost is inevitable, you can even lower the gas cost but doing this is risky cus this will make your transaction to stay on the blockchain for a very long time without confirmation, and sometimes, you will end up with a failed transaction even after the fees has been taken from you, so the best is that if you know the high gas cost is too expensive for you to pay, then better to stay away from ethereum blockchain until the fees comes down.