The Guild of Transport has a monopoly on the substance Aetherflux, and rule over it with an iron hand. Because they have the power to deny someone access, they also have the power to invoke tolls on wares travelling through the circles and, control them. This is especially true of wares entering the Bazaar of Dagall, they are actively put tolls on. If someone is deemed “undesirable” by the Guild of Transport they may be barred from using the circle, if it is guarded by an official from the Guild.