I called the number on the back of the card, like
@palhockeymomof2 did, and said I'd had the card for a while and I knew the AF was coming up in the next few months. I was thinking of downgrading the card unless there was any reason that would encourage me to hold onto it. The rep transferred me to the retention department, and I said the same thing, and after reminding me that the $300 travel credit could be used for groceries and gas, he said they could give me a $150 statement credit if I kept the card. I agreed, and said I had other Chase cards and could he check if I had any offers on any of those. And he checked and said there was a $50 offer on the Marriott so I took that too. Good luck if you decide to give it a shot.