It's not a free gift, but a temporarily interest-free loan. Here's what actually happens: You borrow up to $50 from Binance under the cross margin feature. For just one day, no interest is charged (this is the 'coupon' feature). After the one-day bonus period ends, interest starts to accrue at the regular rate unless the loan is repaid. You must have sufficient collateral to borrow. So, think of the coupon as a short-term, interest-free loan, not free money or a gift. If you don't repay it within that day, you'll start paying interest like any regular margin loan.
Disclaimer: Includes third-party opinions. No financial advice. May include sponsored content.See T&Cs.