Here are some codes to try:
IF you get you already received this sample and never even signed up then CLEAR YOUR HISTORY!!!
“Beginning at 12:00 am ET on July 7, 2015 through 11:59 pm ET on July 9, 2015 9 codes (each a “Code”) will be distributed online. 8 of the Codes will each be good for the first 1,000 people who claim a free pack of Oreo Thins, and 1 Code will be good for the first 2,000 people who claim a free pack of Oreo Thins.”