Small thing about referring: Lets look at http://bux.to/ for example again. When you are going to invite friends to join to the site, you need your referral link. This can usually be found from you profile in the site, in http://bux.to/ click My Stats and the first thing it says there: To refer others, use http://bux.to/?r=Xzin <-- Thats for example my referral link, but you use your own :)