From the article, they happened to have both servers in production at the time of the acquisition.
The acquisition led them to abandon their plan to migrate to nginx.
Also, I thought running through the config for their production site was useful.
It's not even an article really. It's a blog post and it seems targeted as a reference for other admins with chargen.one. Not sure why it got posted to HN.
Doesn't make any sense, technical or other. Clickbait article.