That is another possibility
Those of you who live in New England will know what I am talking about a local supermarket chain named Shaws did a promotion where they were giving away all kinds of prizes but you had to collect these game pieces that you would get at random with your receipt. They had million dollar prizes which I think never had anyone claim them out of the 2 different times it was ran. Similar problems I would imagine happen with stuff like the Mcdonalds monopoly game promotion.