They have found a pretty good niche with a lot of users. Just like how reddit did with subreddits. There are a lot of "smallish" communities out there, based around games, likes, twitch/youtube channels, etc, and they all need some place to hang out when they're not in saig game/channel.

I think right now what matters most is who comes out winner with the biggest community, monitezation can come later.

Destroy IRC