This feature is ingenious. A person could make an account and then make screen names for the people they want to have control over like a class. They have the following things for them:
1. They can look at all the games made by their users.
2. They can block access to things like games, duels, MAG points, and Forums.
3. They get there private forum on which only the members controled by the master can go on.
4. They are Mods for that forum and can change things in the game.
5. When they rate there sub-members they can rate it 0% to 100%
6. They 'can' choose what type of games they have to create. (Fantasy, 4-6 lenth, Regular)
The Submembers could become a full member by creating another screenname and then put in their sub-screenname and password. All stuff that was the sub-members gets copied into the main member. All work on the main member game affects the submember. Also, submembers can't co-author or get co-authors.
It is more or less a way for teachers to give out assignments on here.