Good job, devs.
Many players started using marketplace like its stock market, buying low and selling high. It was pretty easy way to earn ten, hundred thousands of gold without much effort.
How many trades you saw asking item + gold, although item they wanted for it was in the same league as theirs. They just wanted quick and easy cash. And noobs were the ones who payed for it, with their hard earned gold.
This is a good way to put end to that.
Someone asked what's wrong with people having too much gold?
Well, on EU1 we have certain group of players whose ringleader is called DomusperkeleII. That dude wears medium plate and rides mamluke horse all the time, for several months now. He's not very skilled but high upkeep gear allows him to perform very well. You have no idea how annoying is to fight group of 4 or 5 champion mamluke horses round after round. Main point of upkeep was to put stop to it, but these guys abused marketplace to bypass upkeep.
As I said before, idea behind marketplace was to allow us to trade our loomed items. Not to buy them for gold, not to sell loom points for gold. chadz probably thought it could be interesting if he add gold-item trade but eventually that bring us here, where we have high inflation because some people have too much gold and are able to control item prices.
As Meow said, there will be more gold sinks, some should be very interesting.