Yes, Klaytn has a fixed gas fee of 250 ston or equivalent to 0.00525klay. This is a great factor of success for the platform, as it provides a reliable and consistent cost of transactions, which is beneficial for users. This fixed fee also helps to ensure that the platform remains secure and stable, which is important for users who are looking to make transactions. Overall, the fixed gas fee is an important factor for the success of Klaytn and its users.