The Daily Grind: What's the ideal MMO gold sink?

I realize that asking "what's your favorite gold sink" is a bit like asking "what's your favorite way to eat poop," but I'm confronting an MMO reality here: MMO economies generally spiral out of control when the currency poured into the game isn't drained out at the other end somehow, whether it's through decay costs or housing maintenance or people leaving the game forever and literally taking their gold piles with them. Obviously, this last one is not ideal.

I was impressed at Neverwinter's recent move to auction rare companions off to the playerbase, a system that won't solve the inflation/duping problem in one pass but could, given time and repetition, drain money from player moguls voluntarily and reward them with prestigious but non-game-breaking and effectively worthless trinkets.

That's my favorite kind of gold sink. What's yours?

Every morning, the Massively bloggers probe the minds of their readers with deep, thought-provoking questions about that most serious of topics: massively online gaming. We crave your opinions, so grab your caffeinated beverage of choice and chime in on today's Daily Grind!