Here's the problem I have with market wards: they have no limitations. The retainer system would actually achieve it's original and creative purpose if everyone was not allowed to congregate in the exact same area. SE needs to place caps on how many retainers can sit at a certain hub, so that the economy can be spread out into the rest of the world.

In addition, I also think that SE needs to have an automated system in place that gradually increases this cap as more players will up a given server. That way, people won't be forced to spread out to the most inconvenient spots.