Withdrawal requests in cryptocurrencies are different from fiat money.  
1 How to Request Withdrawal as a Host?
During the process you should submit a withdrawal request by entering your wallet address, and specifying the amount to the balance of the wallet. After Marco approves, the amount can be withdrawn by the Host.
2 Can the Host Cancel the Withdrawal?
Yes, but please Note that the host can cancel their withdrawal request before the Marco approves.
3 Does the Host Should Pay for the Gas Fee?
Please take note that you will have to pay for the Bitcoin, Ethereum,Tether network fee in order to complete your transaction.