What's vBulletin Affiliate?

vBulletin Affiliate is a plug-in for vBulletin forums that turns actual built-in vBulletin referral system into a multilevel (unlimited levels) affiliate system. Forum members will earn money while sleeping, from each member they refer that subscribes to a paid section of the forum. And from all members on their downline pyramid! Forums can also be turn invite only, forcing each new member to join a downline!