@josephcox I've recently noticed your links failing, and now have a clue
When you post "404media.co/" links, 404media.co resolves to something quite different from www.404media.co
404media.co for me resolves to 178.128.137.126, a digitalocean netblock which is blackholed by darklist.de
darklist.de/raw.php
www.404media.co points somewhere else entirely
"it's always DNS"