I joined FLX Rewards at Foot Locker. May I still use my benefits at Champs Sports? Absolutely. Your membership status and benefits follow no matter where you shop across the Foot Locker family of brands. Related articles I signed up for a Foot Locker account. Do I need to also sign up for FLX Rewards? What is FLX Rewards? How do I join FLX Rewards? What are Head Starts? How I do I manage my FLX Rewards account?