Ryzom

Ryzom Ring is an instance editor.
With it, players can create their own map with quests, etc.
And others can use it in seperate instances.
Might be what you want to do as wow :).

I have been a WoW Player since 2006 and the instances are called Dungeons or Raids.

Dungeons is a set of 5 players, 1 tank, 1 healer and 3 DPS.
They can enter a certain Dungeon and kill monsters and at the end they kill a final boss which drops better items than you can find from grinding and or buying from an npc.

Raids in the other hand is a group of 10, 25, 40, or 60 people.

The groups are really handled depending on the boss that the group will be killing.

If they make a 10-man raid, then 2 healers and 2 tanks are always needed, the rest is ranged dps and meele dps.
If they make a 25-man raid, then 2 tanks, 3 healers are needed.
If they make a 40-man raid, then 2 tanks, 8 healers are needed. 1 for each group..

and so on.

Dungeons and Raids are not created by the players. They are created by Blizzard.

The Auction House is a great idea.

People can buy and sell using the Auction House and to sell they have to pay a % tax, but the tax is not charged to the player until the item is sold.

The gold/money is sent to their in-game mailbox and it takes around an hour for the money to be delivered.

Yeap, but in Ryzom, players can create some as well :).
Or should i say, it is the only way to have instances.
The whole world on the official server have no instance.

But it could be made since we can't actually create a game like ryzom.

the license of Ryzom and commercial source before opem not use the name of the game in their projects so that I understood.

or not a license and this