Play Sonic Runners while logged in to Facebook, and you’ll be able to invite friends who haven’t yet played the game to give it a try. You’ll earn a bonus of 50 Rings for each friend you invite, and the friends themselves will be awarded 10 Red Star Rings if they start playing the game after receiving your invitation.
(*Rewards are currently being adjusted and may change.)
You can also post the high scores you achieve in Sonic Runners straight to Facebook. If you love the game, why not spread the word!