Bruno Simon sells courses on how to make things with three.js. As a homepage it is an exceptionally good example of what you can do with 3D in a browser, and what buying his course will enable you to build. It's a great home page with that context. It would not work for many other people.

It doesn't show anything for way too long, not exactly a good example of three.js use on the web.

It seems you need that context prior to visiting the website. Which, if you are looking to hire, and they send you to this site as a "show of skill" is totally great. But if you google searched for some info and stumbled on this, I'm not sure you'd even know what's on offer.