Probably because the account has only ever submitted its own content.

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

> Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity.

> https://news.ycombinator.com/newsguidelines.html

potentially overly-aggressive spam filtering? the first comment by that account happens to start off with "The new $39.99 USD Anker Nano 45W(A121D) charger" verbatim.