here is one I know. In the tournament mode you can always be No.1 because the game would not refresh the list without totally quiting it or waiting for a long time. So as long as you play it once then do something else (watching TV, reading etc.), you can always get 8 tickets. Or maybe only my iPad can do this because it is old and slow…
p.s. that means you can use your most rubbish kart and 5 power to get 8 tickets, no need to play hard. Voila.