To a regular player using several to free slots is costly in time and effort of mining but Game Masters on the other hand have the ability to create objects of their choosing by a mere command or through the admin manager GUI. So if a Game Master ever wants to free the furnace of various bugged ores some person left in there he can simply make 5 or 10 or however many ores instantly and free them for all players.
I have to correct you in this mather Malfini.
You're information is not correct in this mather.
There is no Game Master who can spawn items.
We have levels among the Game Masters too, like the players.
Every level within the group of the Game Masters gives us the commands for that level only.
The highest Game Master we have is GM5 and the required level for spawning items is cleared for GM6.
So only certain Developers can spawn items ingame and they are working on a solutions to fix this problem.
Game Masters are also unable to remove items from the Furnace, Forge, Quench Tank, Stock Casting and the Smith Table, like all players.
If i was capable of removing these items, then they were already gone.