Their is no way to predict who is going to use the cards and who is not! I handed out 50 cards at my family reunion last month, and everyone said they would use them. To date none of them have. I passed out 50 the month before at a flea markets and I had 20 of them get used. So there is no way to predict who will use the gift cards and who won't. So good luck on finding a way to predict the future! If you find one let us all know!