[krapp]

Seems more likely to me. Reddit has a far broader userbase, whereas HN is primarily made up of the sort of people who would post with AI. And HN has a non rate-limited API (even though most people here probably use Algolia.)

And people already do paste comments from AI, it's becoming more and more common. At least they have the courtesy of pointing it out but I expect that will stop before the AI comments do.

[morkalork]

While I do love seeing the comments starting with "I asked ChatGPT..." get absolutely eviscerated in the replies and negatively voted, it is probably sending the wrong signal.