Today as education has improved & more surplus professionals available, Fresher to CEO are expendable.
But communication & presentation skills matter everywhere.
I'm a low IQ average guy who does time pass watching documentaries & on various types of tech forums related to my IT job, aviation, military, heavy machines, etc rather than gossiping, watching cricket, netflix, politics, etc. I use emojis for just some humor (website maker can disable them anytime), otherwise lots of different things bothers different types of people. Personal comments & slangs bothers me a lot. On certain forums i'm just an observer bcoz they don't like Indians or use too much slangs, get personal, out of topic, etc.
A moderator's personality is like school-class-monitor, event organiser, SME, TL where discipline, communication & presentation skills matter a lot.
Hence a forum like website's popularity depends on how members behave.