Every time you invite a new friend and make them join the game, you get a bonus! The higher your level is, the bigger the bonus you get when your friends join.
Inviting friends is easy:
1. Select the ‘’Social’’ button in the main lobby
2. Go to the ‘’Invite’’ tab
3. Select the channel that you to send the invite through
4. Send an invite to your friends using your preferred channel
5. Once your friend has accepted your invitation and connected to the game with Facebook, you’ll receive a popup with your bonus.