Watch out every time a new slot appears on the site because the trophy challenge is activated!
Get a gold, diamond or legendary trophy in that slot and you can get an extra reward!
Gold Trophy: 250.000 coins
Diamond Trophy: 1.500.000 coins
Legendary Trophy: 10.000.000 coins
Also if you are the first to get the legendary trophy...... you will get 20.000.000 extra coins!