Xonotic Nationscup - Sign up here

You don't register an account there only to post in those forums, but also to join the tournament. That includes creating, joining and managing of teams, seeding of teams, generating a tournament tree, submitting match results etc. If we don't use esrepublic for that, we would have to use another site like for example tourney.cc (you would have to register an account there too..). I wont do this all by hand in a single huge forum post/thread. That's crazy.