Dobbs.town is the Mastodobbs of the Church of the SubGenius. All paid members are welcome.
But did you know that you could set up your own instance of Mastodon, and pretty cheap, and not too hard to do? Most instances will need a domain, and those can be had for pretty cheap. Hosting can be done by yourself (more work, less cost) or from a hosting company (less work, more cost - this is the route I've taken). Two hosting services among others...
Church of the SubGenius Members-Only MastoDobbs.