American Express targets select cardholders with a $15 savings opportunity on grocery purchases at US supermarkets through a new Amex Offer. Cardholders can receive 10% back as a statement credit for in-store or online transactions, with a total limit of $15 in statement credits. In addition, Pepper Rewards offers 10% cash back for targeted users on all purchases, providing an extra opportunity for savings across various spending categories. This limited-time promotion presents a valuable chance for eligible cardholders to maximize their grocery and general spending rewards.