Shack

–noun
1. a rough cabin; shanty.
2. Informal. radio shack.

—Verb phrase
3. shack up, Slang.
a. to live together as husband and wife without being legally married.
b. to have illicit sexual relations.
c. to live in a shack: He's shacked up in the mountains.

Den

–noun
1. the lair or shelter of a wild animal, esp. a predatory mammal.
2. a room, often secluded, in a house or apartment, designed to provide a quiet, comfortable, and informal atmosphere for conversation, reading, writing, etc.
3. a cave used as a place of shelter or concealment.
4. a squalid or vile abode or place: dens of misery.
5. one of the units of a cub scout pack, analogous to a patrol in the Boy Scouts.
–verb (used with object)
6. to drive or pursue (an animal) into its den.
7. to kill (an animal) inside its den.
–verb (used without object)
8. to live in or as if in a den.

the den just Sounds more interesting

Heres a Few Reasons Why the shack should be shut down,

1. if so few ppl play it why even bother
2. Using bandwidth which means more $$$
3. Not currently being supported due to the fact of No 1 playing on it.