I went over to the Best Buy in Schaumburg, IL around 3:15, and there were 3 people in line inside the store. I walked around the store/shopping center a bit, and came back, and the people were gone. They were handing out out tickets. I went over to where the line had been, and one of the salespeople asked me which one I was looking for, then handed me a voucher, then told me to be back at 5:00, and that if I wasn't back by 5:30, then I wouldn't be guaranteed one.
Super simple! It looked like she had a lot of vouchers too.