I signed up for a Foot Locker account. Do I need to also sign up for FLX Rewards? Yes. Sign up for an FLX Rewards account to enjoy all the benefits of membership. Related articles How do I join FLX Rewards? What is FLX Rewards? Can I get XPoints for purchases I made before I joined FLX Rewards? I joined FLX Rewards at Foot Locker. May I still use my benefits at Champs Sports? Why are my XPoints not showing up?