1. When you add items to your cart, you earn 5 coins for each item.2. You may add as many items to your cart as you like, but you can only earn up to a total of 50 coins per day. You can earn coins on the desktop version and the mobile app.3. You can earn up to 150 coins during the entire game period.4. To get more savings during our Mid-Year Sale, exchange your coins for coupons before Jun 23, 2019 23:59 PT.