Wanna get in on the 12 Days of Christmas auctions but don't have the Von Coins required to win? On top of earning achievements and playing bonus games, we have a referral system you might not know about. You can refer up to 10 friends by generating a unique code and sending it on. This code is available via your user profile page in app. Then when your friend uses it as they sign up you'll both get 100 coins on top of your monthly limit! It's a win-win scenario.