Very simple: You motivate friends to register for the Own360 app as well. You can do this easily by going to "Invite friends" in the BizQuiz menu. They will then receive a link with your code. If a friend downloads the Own360 app and clicks "Get Joker" in the BizQuiz menu and enters your code there, you will both receive a Joker. The more friends who follow your invitation, the more jokers you get.