I could see the following offer in my Amex blue cash everyday account:
Amex offer: Spend $5 at Dunkin donuts and get $5 Back
I saw the offer in AMEX mobile app
when I added to my offers.
Get a one-time $5 statement credit by using your enrolled Card to make a single purchase of $5+ in-restaurant at participating Dunkin' Donuts or through Dunkin' Donuts mobile app by 1/15/2018. See terms for exclusions.
Purchases such as re-loading of DD Cards are included if made via dunkindonuts.com or Dunkin' Donuts mobile app. All other online and mobile app purchases are excluded.