I've just realized how smart the "Invite everyone humanly possible" clans are, like INNAWOODS and The Federal Colonies.
They invite anyone and everyone, then when they become inactive, they feast upon them, and once they are under 100 GDP, they are thrown in the trash.
Much more evil than originally thought.
Also, tons of people to make it look more scary when really only about 30 out of 120 are active every day.