Open the Binance APP--Funds--Contract--Today's Profit and Loss--Funding Fees and Trading Fees, you can see your fees for nearly a year. For high-frequency contract trading and large positions, your fee expenditure may exceed your principal in just one month.

So be sure to open a rebate; the fees you should get back must be reclaimed. If you don't open a rebate, all the fees go to the market. By opening a rebate, the fees are returned to your own account, saving you at least hundreds or thousands of USDT in fees each month.