It's entertaining to create a world. It's excruciating, painstaking work to finish it and make it into something others can enjoy. Plus, people like different

It's entertaining to create a world. It's excruciating, painstaking work to finish it and make it into something others can enjoy. Plus, people like different aspects of MUDs. Creating it from the inside (like in LPMUDs) with others is fun in its own right, even if no player ever logs in. It's like a slow-paced, continuous hackathon, where everyone tries to make "something interesting" to show to the others.