This is an excellent feature added in the GokuMarket Wallet, which detects that the cryptocurrency transfer is made to another GokuMarket user's wallet address and it refunds the withdrawal/transfer fee after the transfer has been successfully completed.
Normal process steps:
1. Complete your standard withdrawal and pay the standard fee
2. The system detects that the crypto withdrawal is successfully completed to another GokuMarket user's wallet
3. The Withdrawal fee is refunded to the user's wallet account
Note: does not apply to fiat Withdrawals.