Spam issue has been resolved and registrations are back open. You can build a collection, comment on posts, and even rate books! I should take this opportunity to mention that the site also has a Patreon, so if you’d like to help keep the server in a happy state of being, that’s the best way to do it. In theory if you pay to join, all the ads on the site will be blocked, starting level for that type of benefit is just $2!
