It was a community built by a former Reddit backend developer, Deimos. He also built the subredditsimulator subs and automoderator, and is looking to purposefully cultivate an online community that avoids some of the common pitfalls, mainly:

• Gravitating over time towards low-effort, lowest common denominator clickbait.
• A culture of lawful-evil trolls who "follow the rules" but are ultimately assholes who ruin the vibe.

Personally I love what he's done with the place. It's small, but it's big enough and I find that the quality of comments is far better than what you might find in most corners of the internet. I've also got a few invites if anyone wants to check it out.

Also the Tildes app is astoundingly good for what the developer is calling an "alpha".