I am a Platinum Carnival cruiser. I have found and hidden many ducks on the ship. People are NOT attaching business cards or promoting businesses on the cards attached to the ducks. What they are putting on the cards is a facebook group that is for people who find ducks on Carnival ships. This group is to show other people what ducks were found on which Carnival ship and what they look like.. The ducks come in many different looks and sizes. Some ducks are holiday related. Some are very little and some are very big. It is fun to show everyone the ducks that are found. Also it is fun when someone posts a duck that you hid. I don't consider this a business card at all. No services are being offered. Just a fun way to show everyone your ducks. If you want to see a boat load of cute ducks then search Carnival Ducks on facebook.