You are responsible for platform and exchange fees as well as the brokerage contract and commission fees. Brokerage, exchange, contract and commission fees are deducted directly from your account balance.
Professional data fees ($105.00/month/exchange if you qualify as a professional) must be paid by you out of pocket from your credit card. This fee doesn’t apply if you are non-professional on a LiveSim account. These are pass-through fees directly from the exchange.
For a detailed view of the fees, please see here.