I call it clever spamming.You used your referral link to inform about the site.If you have already joined it,why asking us to review it?
I'd doubt that they're giving out their referral link 'coz I've visited/browsed the site & 'd like to conclude that this isn't a referral link but the link redirects you to the homepage & there're such other links like -> /?a=faq , /?a=news , etc. However, the site pretty looks like a scam(ponzi) & I'd entreat everyone to stay miles away from 'em.
nah that's right, a refferal link should included a userID or username of the sharer,and the link above seems like a usual link which used on few site