Due to abuse this system has been removed. Its unclear if its every going to come back or be changed 

 So the game has a really cool feature which is the referal system, through this feature we can get 20% of what our referals topup. 

Be aware you will only get the ones he topup since he adds your code, the ones he did before that won't count. And never use codes from lv.1 players in the chat. Most of them are fakers.

Screenshot 2015-01-23-08-39-15-1-

Referal system window