SVT doesn't care about $$$ as they can't take any of it for themselves. They do care about viewership and 'engagement' however! As AC tends to have less interest because of no new song reveals they try to compensate by using a more engaging voting format.I guess the duel format brings in more televote $$$ by encouraging people to vote against acts they don't like. Which also means we can't just look at the number of televotes as those will already be skewed by the duels.