He does have a GitHub account[0]. He successfully founded his own company. Entries from his blog also made the frontpage on HN several times[1].

You, on the other hand, do not have a GitHub account tied to your HN account, or any other records of your achievements, for that matter. You also don't seem to have made any meaningful contributions. But people still took the time to read this comment.

The author's history of contributing to OSS projects shouldn't be relevant here. You shouldn't use it to attack his claims. If someone wants to read the article, they can read/evaluate it based on their personal opinions/knowledge.

[0] https://github.com/erikdietrich [1] https://news.ycombinator.com/from?site=daedtech.com

P.S.: No, I'm not the user registered with GitHub as PaulChap.