HOW LONG CAN I USE THE REWARDS FROM STAMP BOOSTS? HOW LONG CAN I USE THE REWARDS FROM STAMP BOOSTS? You have 90 days to use the rewards from stamp boosts. Related articles HOW CAN I ADD MY PREVIOUS VISITS TO THE APP? CAN I EARN MORE THAN ONE FREE REWARD BEFORE I REDEEM? IS THERE A LIMIT TO HOW MANY FREE REWARDS I CAN HAVE AT ANY GIVEN TIME? ONCE STAMPS COLLECTION STOPS, WHAT HAPPEN TO THE APP OFFERS? HOW WILL I KNOW THAT I HAVE A REWARD ON MY KFC APP?