Years ago, I had a work account that answered troubleshooting questions in the company subreddit. It was actually pretty great for that, because active users could get their answers quickly, but also the answers were preserved for future users. Our corpirate site had a community page, but it didn't have 0.01% of the daily views the subreddit had.
I left that job years ago, though, and I don't think the sub is as active as it was.