RCS is the perfect product for the development of private knowledge networks that live behind firewalls in corporate or institutional environments. It also is perfect for publications and ISPs that want to host public communities on their own systems. By offering this software for free, UserLand is saying: Let's Grow Communities Now. In both cases a fully updated 8.x release is required. That makes customization a breeze. Your community can be up and running within five minutes. Of downloading the sotware.