Mobile communities for niche interests

Love that Amino is building a mobile network for niche interests. It's like having a Facebook JUST for stuff you actually care about: Doctor Who, Anime, Minecraft, K-Pop, video games, your pets. The target demographic is teenagers. They have over a million downloads for their apps. I'm interested in seeing which community they roll out next.
@ZackShapiro this is an interesting take on updating the forum format, building upon what actually works about forums.
Just caught this post from @aweissman. The app looks a bit more polished since I first saw it in May. It's also come up in a few conversations with other startup folks.
@rrhoover have you seen the latest product we just dropped? Users can now create their own communities in a single app called Amino. Let me know what you think!
@benjo430 oooh, super interesting!
It's overall an interesting set of apps, but we will have to see how it plays out a bit more. I think they have some good ideas but I'm not sure how it's going to keep expanding.