No, its not. That's like saying Mcdonalds came up with the idea to open a burger restaurant, so nobody else is allowed too open one, and yet we have burger king, etc.
I'm not sure if you're trying to troll this thread or are willfully being ignorant of what is being explained too you here. I edited my first post for a clearer understanding of what i am talking about. I'm assuming you didn't read it so here it is again -
"In massively multiplayer online games, an instance is a special area, typically a dungeon, that generates a new copy of the location for each group, or for certain number of players, that enters the area.Instancing, the general term for the use of this technique, addresses several problems encountered by players in the shared spaces of virtual worlds. "
Taken from wikipedia -- http://en.wikipedia.org/wiki/Instance_dungeon