I noticed that the author put their email address clearly at the very top of the article. At least they eat their own dogfood.

However, the problem is the great many excellent online writers do everything they can to make themselves hard to contact. Worst of all are those professional writers who work for major publications. Their interaction model is sniping from bushes on the hillside rather than deigning to descend amongst the filthy masses and speak face to face as a peer.