I've used a few offers on my CSR so far. For example, there was a 10% cash back on Marriott purchases, max $60 cash back. I spent a week in Hong Kong at the JW Marriott in November, the $60 credit appeared a few days after the stay charge had posted. This is very similar with how Amex and BofA are doing offers, it's a bit of work to keep track of them, but the cash back is nice.