The only logical stand point I can see from this:
1. They are trying to lower inflation by forcing us to use checks in our transactions. These have a drawback as you can see. :P
2. Stopping [[most]] overnight shops. Having so many players camping in mega can make the below-average-computer's player go through LAG HELL. This could also lag up other areas of the game? I dunno.
Those are the only two points I could see that nTreev would do this.
On another note, this also has a fatal flaw.
Not only does this disgust your player base, nTreev, but you've given further discrepancy to the spamming of the Bulletin Board.
Now that we don't have the high-priced shops, players will seek the Bulletin Board to force their items to be advertised.
Goodbye Parties, hello Advertisements.
The best kind of victory is the Come-From-Behind Victory!