-Trade dominances - Nothing too complicated. We have enough production of certain goods that we more or less can ask whatever price we want and they'd have to pay it. Noting that this will change once production starts saturating demand and the guilds most certainly would bring out the knives when that day comes.
Funnily enough, we keep pushing that day back by virtue of having a truly gargantuan internal market. They can sell cheap stuff to the poorer segments while the total Patrician population we have probably exceeds that of any three of our neighbours.
After their tantrum they will probably notice that the city markets make up a vastly bigger slice of the pie than the entire external trade combined.