Noticed that the automated voice says "...a gift card of up to $10 off", meaning it is probably one of those " $1 off a $5 purchase, $5 off a $25 purchase, $10 off a $100 purchase"
Also, we are entering a redemption code from our "receipt". Since the code has 17 digits, I assume that means every receipt has an individual code. So, probably only the first one to enter the code will receive the "prize".
Guess we'll find out in 2 weeks!