In my current game, I was outpost spammed by Altair and actually flipped a water shard and wiped out all of the outpost's ZOC when my single city built a town hall. Later, an Asok Knights has come to me the same way off of Pariden. So it goes by level of prestige perhaps? Verga had just surrenderd to me and his prestige was added to mine. Now, if the Asok Knights weren't so damned high on the tech tree, they might be useful...
