This is a pre-sales question (still deciding on whether or not I am going to go with XenForo). When setting up a new site with XenForo, is there a way to allow different tiers of membership (like vBulletin has)? What I mean by this, is a way that I can allow a free level of membership, but also a paid level of membership (i.e. $60 for life) that has some more perks like a signature, more image storage, custom user title, etc.?