Many of the technical blog posts that are most up-voted here on HN would be best described as content marketing. That the posts describe something technical is almost incidental to the point of making you aware that the company writing the post exists.

HN eats up all sorts of these posts from companies selling backend-as-a-service, low-code-web-UI-as-a-service, unreliable-replacement-for-Heroku's-free-tier-as-a-service, and so on...