My main problem with the market wards is, they can go down. Countries would fail if they're economy went to a complete halt the amount of times the wards in Eorzea do, of course this is caused by the massive amount of retainers in Uldah, which is caused by everyone being in Uldah, which is caused by the main storyline leading to Uldah, and the fact that players need a communal space, especially when population is low.