Sad story. Back in the 90's I used to eat with friends at an Unamas! mexican restaurant which had a jar where you could drop your business card for a chance to win a free lunch. I asked them what they did with the cards, they didn't know. So I asked them how could I collect my free lunch if I won? They said "You will get a coupon which you can bring in for a lunch." I said "When does the winner get picked?" and they said "Every Friday, someone comes by to get the cards, they pick the winner over the weekend. So on Friday I went over at 5:30 and waited for the cards to be picked up. In comes a well dressed lady with another jar, same labelling, drops it off and picks up the one with cards. I intercept her on the way out, and ask what she is doing with the cards.
As it turns out, she was the receptionist for a recruiter in the valley, they took all of the business cards, added these people to the list of people who they told their clients were 'looking for jobs' and then tried to move them from one job to another. I pointed out that Calfornia state law required all of that information to be available at the point where you entered the 'contest.' She said she would pass it on.
On Wednesday when I went in the jar was gone.