From EU.AionOnline.com's news feed:
You’ll be able to win great prizes on a daily basis at our stand in Leipzig this year by completing quests.
The quests and all related information will be written on little cards we will be giving away after special shows on our main stage. Quest types and instructions will vary – just like in our games - with different XP rewards for each of them. Collect as much XP as you can to make sure that you’re one of the winners announced during the last show of each day.
More...