Chick-fil-A offers a customer feedback survey at https://www.mycfavisit.blog/, granting participants a chance to win a complimentary sandwich. This exclusive offer is specifically available to United States residents who are loyal customers of Chick-fil-A. By completing the survey, customers not only contribute their valuable input but also stand a chance to enjoy the gastronomic delight of a free sandwich as a token of appreciation from Chick-fil-A.