I Rely on the Cashback System to Become a Tycoon

Before cashback: I heard that other people's cashback systems allow you to swipe at will without any limit. My system actually requires my salary to be used as capital to get cashback. Is there any reason for this? That's my hard-earned money! After cashing back: Brother Tongzi, maybe I spoke a little loud just now. Well, this little cashback money is so delicious!