Anyone use Shopprize?

It's another one of those receipt scan apps. They give you about 100 coins per receipt with $5 gift card payouts at 5000 coins, or you can use those coins to enter sweepstakes. After about a week and a half I already won Cards Against Humanity. They have other things you can enter to win like Amazon gift cards, jewelry, hard drives. Anyways, I haven't seen any talk on it on is sub so I'm just wondering if anyone else has used it or has won with it and received their prize.