We actually had an instance of Reddit that someone at my company hacked together an integration with our ActiveDirectory and we used it like an internal wiki and discussion board. It was better than anything else I've used.
Reddit was never a remote company. We had a few remote employees at some point, and then in 2014 that was stopped, and now it looks like remote is back. But for at least the first five years, no one worked remotely (except the last two weeks of December, when we all worked remotely).
