"Marketing hat" is extremely civil. Back off.

I see you didn't disagree with the main thrust of my post.

You'll also note their 'About' is empty. Regardless, engaging with HN in this manner is de facto marketing/PR. Trillion dollar companies don't just let anyone post on high-profile social media websites for any length of time without permission from marketing/legal/PR.

Engineers can nevertheless also be marketers for their employer's products.