Zelrius here on another account. (Zelrius account is banned, am allowed to use others)
As a player who is bordering 4 years on the site, I've seen it grow and die, much like a wildfire. To touch on what @Oikawa has said here before; The switch to numbers is, in my opinion, what did it in for most. Myself included. Near the end of my character's life, My activity cut down significantly; It was no longer about role playing the implications of my character and his situation, Instead, @Vale and I would spend hours pouring over numbers and stats, trying to exploit and gain even more of an edge
