No building is taller than one floor. The people live in flats. They eat flapjacks for breakfast. The businesses in the Lower Arky's are boring places to work and boring places to shop. Sales are flat because nobody ever changes.
People buy the same things at the same places at the same times every month.
Even the organizations in the Lower Arky businesses are flat. There is one sales department. One production department. One shipping department. There is no diversity in the Lower Arky's.