This is a very good idea, but let's push it further. Groupon could let people collect points and badges for their continued patronage at stores that were featur

This is a very good idea, but let's push it further. Groupon could let people collect points and badges for their continued patronage at stores that were featured by Groupon. These badges would identify the best customers, and Groupon could offer them rewards. People may feel even more motivated to continue shopping at such stores, and Groupon will know who the loyal customers are. Groupon could literally become an Air Mile card of sort.