Sure any one can register without referring link,it doesn't matter I think this may be their promotional season.They do not pay for after registration with mine or any one referral link.So why this referral Di.Let's we some one make deposit after registration with a referral link they will pay us to small commission.that's the process.Here I'm do not target any earning process and I'm try to introduce a site to make powerful back link for different sites.now I create 15 back links from over PR3 site.this was great chance.just target that.if you want to earning process just target high earning process like adsense or adbrite