They're certainly just random links from the page. I tested it on obscure pages with only a few links and it's very obvious that that's what it does. Take this page for example: https://wikidive.tulv.in/dive?topic=Alex_Alley

You can also go to this page that happens to have links to every date page and you can clearly see that it's not picking anything related to the article contents as most of the time it just picks a random date rather than one of the related topics: https://wikidive.tulv.in/dive?topic=List_of_non-standard_dat...

I don't know why the creator doesn't just say that it's random instead of making an easily falsifiable claim that it's "AI-guided".