Maybe I am missing something here. I notice that the NC can go to the manage tab and get their invitation link. It appears that invitations are tracked for regular members too but without invitation links .
Is it only through the invite system internal to Ning that members can invite? In other words, can members get their own invite link. I would find this useful for tracking invites by members and I think they would like their friends to use it as well for contests that may involve "who invited the most and had them join?"