Sts what happened?All my goblin altars disappear

[Ebereasider]

“Useless” to me (and to most players) means something that can not be used.

Even if they become non-usable, there's still some use in form of liquidation value. OP (and other affected players also) could have gotten about 4.4 mil gold from his altars by liquidating them, not close to what he invested but still would have been something, which he cannot get anymore because those were removed without any kind of warning