You can deposit your RMO/RMG/RMI tokens from your WAX account and start using them right in the game. Deposit has a zero fee and makes your token available in the game almost immediately.
To withdraw in-game tokens like Oil, Gold or Iron, you need to pay 2% fee. Also, to withdraw tokens your energy must be greater or equal to 32. It takes 1 day before tokens are sent to your WAX account.