Why was the AMA posted on /r/AMA instead of /r/IAMA? Certainly the future CEO of GitHub is notable enough for the latter subreddit.
There's really no reason that a CEO currently making headlines should be on /r/AMA instead of r/IAMA (70x more users).
https://www.reddit.com/r/IAmA/comments/3rid26/we_are_the_mic...
https://www.reddit.com/r/IAmA/comments/777mb6/we_are_the_mic...