People tend to check in during these times:
Sports Authority is the nation’s preeminent full-line sporting goods chain. Shop online or in-store for all your favorite brands.
Earn 5% back on your purchases at Sports Authority! Ask an associate about "The League" and start earning today!
You'll unlock this special every time you check in.
USE the foursquare special. Check in, spend $100 you get a $25 gift card. Special is good EVERY time you check in.
If you get a survey with your receipt, fill it out! You get $10 off your next purchase of $50 or more that you can print out right when you're finished! Please leave a nice comment about Sarah :)
They didn't even know what Foursquare was, so they wouldn't honor the special offer. Obviously their training is lacking.