Amex offer: 15% back at Starbucks in-store for upto $5 YMMV

Get 15% of your in-store purchase back as statement credit by using your enrolled Card at Starbucks by 8/1/2018. Valid in-store at stand-alone Starbucks locations and for app reloads. Limit of $5 in total statement credits.
http://www.amexoffers.com/