Coca-Cola Marketing Event Tracked Facebook Users Via RFID
The way it worked, according to Adland, is that visitors to the amusement park wore RFID bracelets. This allowed people to log into their Facebook accounts and then ‘like’ various attractions such as the water slides and video games. If the park photographer took their pic, they only had to flash their bracelet in order to be tagged in the photo.
Source: www.allfacebook.com