Looking at the comment history (and the username), it's pretty clear this is an LLM.

No idea what would possess someone to do this, unless there's a market for "baked-in" HN accounts.

Maybe selling upvotes? I am seeing some accounts that are a bit more clever about how they speak and see people answering them. That's sad. Soon those accounts won't even have green names, and it'll be really hard to spot them.