Make sure the spending target is met by big margin.
Last year, I accidently miscalculated the spending target (HSBC's terms and conditions are complicated!), $3000 by around $50. I tried requesting HSBC Credit Card Centre to allow me to redeem the coupon and I would spend the deficit ($50). Even though I spent a few thousound dollars more than the target and I regularly used HSBC card for over 10 years, HSBC insisted that I could not redeem the coupons.
I conclude that HSBC is unkind, cold blooded to customers and does not value a good customer relationship.