I suspect the author is summarizing the response in an inaccurate way. I suspect the response was that distrowatch is remaining filtered (because it linked to a tarball that AVs flag as malware).
If your domain links to content that AVs flag as malware, it gets blocked on FB. This is probably not shocking? Distrowatch is likely uniquely susceptible to this because they're constantly linking to novel, 3rd-party tarballs ("Latest Packages" column).