> As he points out in the article, they alerted him to the documentation updates in the course of their emails back and forth.

Technically, this is true. From the story though, it sounds like the PM included this information after the author reached out to the PM directly. Only after that did support say "I see we reached out to you about documentation updated!".

So while yes, they did technically tell the author about the documentation update, I'm not sure I would classify it as them "alerting" the author.

> From the story though, it sounds like the PM included this information after the author reached out to the PM directly.

Exactly the case, and it's because he happened to have the PMs email. Not because Stripe gave it to him or offered to send the PM his way.