What do you think Anet's plan is for 90% of the unused game?

[Alaris]

Ferrets kill for sport? Hah!

In nature... Domestic anything can develop weird behaviour...

Uru is an MMORPG that has no armor, weapons, combat, crafting, minigames, (...) The gameplay is pure puzzle-solving adventure story

Well, the design would have to make the game replayable, and puzzles are often not replayable (exceptions include Tetris and similar games). But it sounds like the content was just too costly to create at a rate necessary for success.

Game with no rewards? You mean Eve online?

I'd assume the economy is its own reward.

Starcraft I and DOTA for Warcraft 3 are good examples.

Nice.