Well, okay, in that case I'd only add "arranging tournaments" and "running fan websites" to the list and you have indeed covered the entire community that supports playing the game on- and offline.

Having great players around and new ones pop up do make me stay interested in playing competitively, though. Similarly, I remember seeing a video on youtube of Slayer beating a test at what seemed to me as incredible speed, prompting me to actually try to get better at playing tests for two days or so before I gave up for lack of talent