This is valid.

1. each one is a first-party vendor announcement, submitted very close to the announcement and under the vendors headline.

2. Titles are "verbatim" vendor headlines. No editorializing which follows HN guidelines to the letter.

3. Someone; a script/agent is watching vendor feeds and X accounts then submitting within minutes of the posting.

4. Altman/Navier–Stokes post got [duped] so prob not inside thing.