It was launched in 2016, with a much simpler interface (no accounts iirc), which evolved a lot to come to this day.
Its source code is also really interesting, it makes me want to learn Scala.
Its source code is also really interesting, it makes me want to learn Scala.
It's been around at least as far back as 2010. Here is a 6 year old HN submission about it: https://news.ycombinator.com/item?id=1927188