It's about reducing the overall amount of money in circulation and it will hit the hardcore traders the most.
Kinda like killing wallstreet which is a good thing.
I dunno, IMO I think that the hardcore traders have enough money and plenty of items already, I think this would impact regular players more, as the hardcore traders can still afford to trade.
Whereas, regular players starting out, will not be able to make money in such a way. People will post items for more, and the room for profit is decreased for casual traders, not only do you have to post for >5% profit, but you'll slowly lose money if nobody buys your item.
As an example, if you were to purchase unpopular items for 300k and repost them for 320, you would slowly be able to make money under the old system. Now somebody would have to post an item for 316k (estimated) to earn the same amount of money for themselves, while you'd have to post for over 350k to make the same amount of profit.
This also reduces the amount of money players can get for their loom points, which is typically something that only newer players sell to enter the market. I highly doubt that established players are going to offer
more money to make up for the 5% loss.
If you're looking for a gold sink, I think the auctions are a great way to achieve this, once they're set up in such a way that they're useable, as they would become a preferable way for getting rid of items, as you're GUARANTEED to sell them, maybe even at a higher profit.. or perhaps even adding a different system entirely, but I don't think trades are the right thing to penalize, especially since you can advertise on the forums, and simply trade items, straight up, for a fee of 100 gold.
Change as it stands seems like it's a deterrent from using the system entirely as opposed to getting gold out of the economy.
tl;dr the % cut and 100 gold fee impacts high-frequency lower-tier items more than hardcore traders and makes it harder for newer un-established players from getting into the market.
I hope this market cut eventually fixes it.
It won't, because you have to actually
sell items in order to be impacted by this. Sure, a person will lose out on 30k gold when he sells his loom point, but if he's just a tincan and using the gold to pay for his repairs it won't change a thing, 570k is still enough money to ride out several generations in the most expensive gear.
If the problem is that people sell their loom points and run around with way too much gear as a result, a weekly/monthly tax would be a much better alternative.