In addition to gas fees, we currently have a 5% performance fee for PWRD & Vault and a 10% performance fee for Labs (approved by Vote 005). The performance fee is a system parameter that could be subject to change by governance in the future.
There is also a 0.5% withdrawal fee (the HODL contribution) that will be removed for PWRD after the full implementation of Vote 009.
We keep a small percentage of TVL in reserves in order to allow for withdrawal traffic to have easy, low-cost access to funds and to not have to withdraw from strategies. In the long term, we expect the protocol to be able to handle the vast majority of deposits and withdrawals without needing to swap or withdraw from strategies while still maintaining a state of portfolio equilibrium. As usage goes up, system stability and yields follow suit while user fees go down.
We have optimised the Gro protocol to minimise user gas costs. Over the long term, the vast majority of deposits and withdrawals should incur minimal gas fees. However, exceptionally large deposits and withdrawals, which could wrench the protocol out of equilibrium, cost more in gas in order to rebalance the system on their way in our out.