Eventually Butterfield and Fake got bored with Flickr and created Game Neverending 2: Glitch.
Glitch got pretty much exactly as traction as Game Neverending, which is to say "nowhere near enough to be economically viable". This time they spun off their internal chat tool to create Slack.
Glitch the game never even showed up on my radar. Too bad (or maybe, for the best) it was never something I heard about.
So I had to do some googling for what seemed like a pretty obscure thing that morphed into a huge thing that takes up way too much of my brainpower these days, and found this story about the shutdown of Glitch and the start of Slack https://johnnyrodgers.is/The-death-of-Glitch-the-birth-of-Sl...
Glitch got pretty much exactly as traction as Game Neverending, which is to say "nowhere near enough to be economically viable". This time they spun off their internal chat tool to create Slack.