VIP fees too good to be true?

Noob question here. I’m looking at the fee structure of the Coin-M futures. Once you get to VIP 5 (1 billion BUSD vol per month) then they stop charging a fee and you receive -0.005% per trade. Am I understanding this correctly? I’m learning about staking and market making and it all seems inter related. I understand that providing liquidity to the market is providing a service which you’re paid for. But once you get to this level it seems the returns just get too good to be true. I guess I’m wondering, what’s the catch? Why doesn’t everyone just do this