Some are already winning!   Another nifty IndieGoGo feature- they enable referral contests for your backers.  
Get treasure-tier books, share with your friends, and get even MORE treasure when you do.  #indiecomics #comics 
https://www.indiegogo.com/projects/dreamkeepers-volume-5-assassin-s-flaw/x/12805942?create_edit=true#/updates/all