User blog comment:Aftenshnoshnikr/Attack On Titan's Tribute Game/@comment-76.9.80.86-20140319060426/@comment-2165064-20140319140946

Feng's site got a DDoS attack and since then public servers ceased to exist. Supposedly Feng forgot to activate them when the site was ok again, but now he's working on a new "public servers" system, so we just have to wait.