Well it's primary purpose was to cut email. And it has. We had a lot of emails that had a lot of replies that were not actionable, like birthday emails, and new hire intros. After 30 "Happy Birthdays!" and "Welcome to the team!" responses you get pretty annoyed seing the thread hit your inbox.

We also has a lot of emails about interesting articles about our company, or the space we're in. Sometimes discussions would happen in email, and not being well threaded it was hard to follow. Also those emails are not usually actionable, but they appear in your inbox.

We post a lot of interesting links in convoy, as well as all the above categories of conversation. It definitely has more of a reddit feel than a HN feel. It's not a work-only type of environment. We have fun. Since the video team has hours of video of the teachers, they have this habbit of making embarrassing animated gifs and posting them, which is fun.

We don't really have rules about what you CAN post in convoy, we have guidelines about what you SHOULDN'T put in email. If it's not a good convoy post, votes will take care of it.