i say we spam them back! Yeah!! --lol jk dont do it. But i would ask Anet , instead of nerfing skills--to investigate this and stop the bot spamming problem.
I would assume they are hitting American servers to get better prices. ID in all the other areas seems normal to me. It looks like only Kamadan is really vacant.
It has to do with the fact that the Asian, American, and European districts are now all linked together (go under more options under International). There is no reason for "asians" to go to International districts to trade. They can come to the American districts, or you can go to them.
They probbably know that Americans fall for scamms more easily than other nationalities and wish to take advantage of that.
You rarely get any gold spammers on the English District.
Yeah most of the time when I go to Kamadan to buy or sell, American d1 is full I always end up in d2 telling people to come to me cause I can't get into d1.