His GH contains a bunch of cool CC-BY-SA 4.0 and MIT licensed content https://github.com/hendricius?tab=repositories

It must be that these submissions are coming from the Ars article <https://news.ycombinator.com/item?id=42264983> because there's another one for the GH repo <https://news.ycombinator.com/item?id=42268221> which was, itself, discussed in depth 2 years ago https://news.ycombinator.com/item?id=35961590