Can someone explain how he achieved this?

I came across someone who managed to index and rank his Google Groups conversation within a few hours. After some analysis, I was led to this site:(vaxesbike. com/product/pillar-spoke-x-tra-lite-ti/). While digging into it, I couldn't initially find the anchor text. However, upon inspecting the element, I discovered not only the anchor text and backlink but also a multitude of other backlinks in the same location. These backlinks are hovering from right to left at the top of the website.

Can someone explain how he achieved this and what his goal might be? I think it would make for an interesting case study.