Quaker True Delights Offer

I was at Target the other day and purchased a box of Quaker True Delights to try. They were on sale for $2.83 which wasn't too bad for a snack for the boys. I normally would not purchase these at that price, but did have a coupon which took .50 off so thought we would try them. Inside the box was a survey card which if completed survey they would send you a $10 cash card. This is not advertised on box or anywhere else. I was very thrilled and have completed survey and now waiting for cash card to come snail mail. There is a limit of 1 per household, so not worth buying several boxes to get more than one card. I figure a $2.33 plus tax cost for $10 back was well worth it.