From the store to internet surveys

After making a purchase at The Gap, I received not one receipt but two. One receipt was the usual one about the price, taxes, etc. The other receipt was with information about an online survey. If I went to the link listed on the receipt and answered the survey, I would get a code for a 10-15% discount on my next purchase at The Gap. This is a great way to have people answer surveys and to drive consumers to the internet!