Now now. Before you get upset with this. Please read and understand.
Since the implementation of the Firmament and how easy it is to level DoH/DoL now. There has been a HUGE influx in people posting on the boards. It was the be expected, as they wanted Firmament to help people get into this aspect of the game easier. Imo, it was already pretty straight forward. It just took time and nobody was willing to put any into it. At least those that were lazy, which again, is my opinion. With Firmament, people saw it was overly easy to put minimal effort in and sky rocket their classes. That's fine! All well and good. Which has lead to many new people on the boards, for better or worse (I'm looking at you, person who undercuts by entirely way too much because you're new to working the market).
Now you may be wondering where the CWT comes into play. Well. Firmament was the first step to tanking everyone's boards. But now, and I say now very loosely as it's been a problem for quite a few months now, you have people who are abusing this for tanking markets. If you were to go into your boards now, or you're the type of person who has already taken notice due to you working the boards already, you'll have noticed something. There are quite a few people who have bought and boosted many a retainer on worlds they DO NOT reside on, simply to make a quick gil and tank that market. I have personally spoken to somebody who has said this outright. "lol This isn't my home world. This is my alt that I use to mule goods. I don't care how bad the market gets here because it doesn't effect my server at all. Sorry". I cannot name them, but this is a direct quote from them.
Further, I have also looked into some of the regular names who do this. Noticing all new retainer names constantly showing up but the same person on the crafted name. Upon looking them up or going and finding them, some of them do in fact third party/bot craft and gather without ever logging out. This isn't right nor is it fair. Imo Cross World market crashing due to trading in this fashion needs to be limited in some way/shape/form.
!) The most extreme - Take out CWT. It would hurt those that just give items to friends or whatever, but it would help normalize the marketboards and stop these scummy practices.
2) Put a level limit on the sales of items. These people would have to have a max of 80 (or current level) with a retainer of the same level the item being sold is of. So if, in example, one was to put a Chili Crab meal up for sale, that retainer would have to be level 80. Sure, they could purchase a level skip for the retainer. But they'd have to do it on each and every retainer on their alt account for that world. Limiting the abuse of this feature due to them not wanting to spend that much money monthly to do so.