If Joko and Klaas win the game show "Joko und Klaas gegen ProSieben (2019)", they win this show - 15 minutes airtime where they can do whatever they want. While they sometimes play pranks, they mostly use the time to address issues of major importance.
If Joko and Klaas win the game show Joko und Klaas gegen ProSieben (2019), the reward is this show - 15 minutes airtime on ProSieben where they can do whatever they want. Sometimes they play pranks on other TV stations, but more often they use the time to show issues of major importance which they feel need to be addressed.