Uber Gift Cards: $15 for $20 at GameStop B&M

When you purchase any Uber gift card at GameStop ($15-$500), you receive a $5 bonus card on the receipt.
Essentially, you are getting a $20 gift card for $15, making this a 25% deal. This deal runs till 7/5.
It’s on page 5 of their weekly ad.
http://www.gamestop.com/weeklyad