There is a host overwieving the game and even creating the game, similair to DnD.
The host creates a sign up thread, players sign up, and once there are enough players and game thread gets created and the game starts.
The game itself has 2 phases, day and night, both together are a cycle. And depending on the player ammount and game complexity it might take several cycles to finish with each cycle being estimated of 48-72 hours.
There are different type of players, some post 100s of posts per cycle other post only 10 or 20 times, but both type of players can end up being equally good.