>Why?
Because once the problematic content is removed it should no longer be blocked.
>It's accurate
It is neither a C&C server for a botnet, nor any other server related to a botnet. I would not call it accurate.
>Nobody should ever use that site
It has a good reputation for archiving sites, has stead the test of time, and doesn't censor pages like archive.org does allowing you to actually see the history of news articles instead of them being deleted like archive.org does on occasion.
It's not just problematic content, it's criminal behavior. And the site has a bad reputation for archival, given that the owner altered the content of archived articles.
It is in fact a botnet - they’ve been hijacking user browsers to act as a botnet to DDoS.
The site started doctoring archived versions as part of the petty feud. That is, what was supposed to be a historical record, suddenly had content manipulated so as to feed into this fight[0]. There is no redemption. You want to be an archive, you keep it sacrosanct. Put an obvious hosting-site banner overlay if you must, but manipulating the archive is a red-line that was crossed.
[0] https://en.wikipedia.org/wiki/Archive.today