My ghost site is intended to support our club. We need to have three levels of signed up members to the ghost site with a hierarchy of access to posts. The levels would be 1. Club members. 2. trusted signed up visitors. 3. Other registered visitors and of course 4. public - i.e. not signed up at all. Access to posts will be level 1 get access to all posts, going down to level 4 who gets access the least number of posts. I presume that I can achieve this hierarchy of access by having tiers, however I do not want to charge club members or registered visitors, and would start them up by signing up and me setting their tier level manually. Can I do this, it appears that tiers can only be allocated by having it done by paid sign ups?