I'm a structured data maximalist so in addition to RSS and Atom, I implemented Schema.org metadata on my blog for GoogleBot, and I implemented JSON Feed and h-f

I'm a structured data maximalist so in addition to RSS and Atom, I implemented Schema.org metadata on my blog for GoogleBot, and I implemented JSON Feed and h-feed/h-entry markup, even though I've never seen anything that actually uses JSON Feed out in the wild. I'd be interested if there's anyone out there that's actually using these sorts of feeds.