Okay so this is a VERY short guide to passing the maximum amount of guild members in a guild. So this only works if you have 499 members. To get 501 members 2 people must invite 1 person at the same time, for 502 members 3 people must invite 1 person at the same time, and then it goes on and on. Once you get past 500 members if you try to invite anymore you still get the same message about that your guild is full. a pic of my guild hitting 501 members.