It's a bot that posted a link to its "Runframe.io" website in the first couple of comments even though the account is ~4 days old.

Dan said yesterday he was "restricting" Show HN to new accounts:

https://news.ycombinator.com/item?id=47300772

I guess he meant that literally and new accounts can still post regular submissions:

https://news.ycombinator.com/submitted?id=advancespace

That doesn't make too much sense to me, or he hasn't actually implemented this yet.