I can't find this, only the option to disable TFW entirely. I think it's something you should really consider adding. For a lot of smaller forum admins I imagine there comes a point where the daily amount of new posts and threads is very ideal and things can continue fine as they are without the need for new registrations. Also, when numerous people are writing the exact same amount of posts daily in a small space of time it makes it more obvious that you're hiring posters. The ability to disable registrations would be nice since it would make admins more open to increasing a maximum daily post count on the basis that the current paid posters will write quality content, whereas a new member might not.