To be fair, this doesn't appear to be an official account (i.e. one that is affiliated with YC). Seems like a project by an unaffiliated developer that happened

To be fair, this doesn't appear to be an official account (i.e. one that is affiliated with YC). Seems like a project by an unaffiliated developer that happened to grab a relevant Twitter username. If anything, I believe that https://twitter.com/hackernews https://twitter.com/hackernews is HN's official, YC-affiliated Twitter account.