I would be surprised if that was still the case after a Fox got done playing taxi to Julian & pals.
I'm sure they could weasel out of that easily.
"Chancellor, please. We cannot be held accountable for the actions of every Aimag and Khanate in our entire Clan. Whatever arrangements your foe has with our wayward Trothkin is between them and them alone. In truth, the presence of Tiburon in our wate- forgive me, your grand domain, is cause for some concern on our part. Personally, it is a deal I would never have made, for the folly of even dreaming to challenge your divine might. But, to assuage your concerns, we are prepared to offer a blanket 5% discount on all purchases made until the end of the fiscal cycle. Please think of it as our way of honoring the brave sailors lost over Marlette."
The thing is though that the CapCon started to pester Sea Fox affiliates for war supplies when Celestial Reward ramped up. The Foxes didn't take kindly to these attacks (lore from the Nagasawa dropship). I wonder how long the Foxes will let that continue. Also from the FM 3145 the Foxes often increased their sales to the Capellan March whenever the Confederation attacked merchants that were affiliated with the Foxes. And now with Terra fallen I'd wager that the Foxes won't deal with the Capellans any more unless they truly want to be seen as "merchants of death" (and I am not sure if the Ilclan will take kindly to those who support their opponents)
All true, but that was a very true situation by 3145. We can see that the CapCon still has access to things like the Coyotl and the Lupus that started going on sale in 3145 and 3146 respectively, so the Foxes apparently still didn't mind accepting Capellan coin any more than the Capellans minded paying increased prices. I too am interested to see how the Sea Foxes will handle things when Alaric starts telling them who they can and cannot do business with.