When can I add Xtra Boosts to my entry? When you're almost finished with your entry, then you'll have an opportunity to apply Xtra Boosts. Related articles Contact Us How many Xtra Boosts can I apply to each release? I joined FLX Rewards at Champs Sports. May I still use my benefits at Foot Locker? If I create two accounts, then can I combine them? How do I earn points?