Malware Site That's Ranked 61st in World

I came across this interesting website that shows to be ranking 61st globally, according to SimilarWeb.

It is categorized as an "adult" website, but searching for it on Google only provides a list of sites claiming its malware. UBlock also flags the site as malware.

According to SimilarWeb, it has 700+ million monthly traffic.

And it has over 17.7 million backlinks according to my backlink checker, yet ranks for zero keywords (probably blacklisted).

Only the subdomain `syndication.[second-level-domain].com` is accessible, and the earliest archive.org for this subdomain is from May 13, 2020.

I suspect is has to do with malware and browser infections, causing users to unwittingly redirect to their website, explaining the huge traffic.

Anybody have further insights into what's going on here?

I've always thought these "ranking" websites to be complete bunk - is there any evidence they aren't?