How do you get super shills on secret builders

Well, you can buy them for $5.95 or you can earn them! Go on the game, then into your home, and there is a treasure box that says, "Earn free gold coins!" Then click on it, then there is a menu. You can choose to earn up to 12 coins, 5, and many more choices! You either have to watch a short video, or download a Bing bar or something.