Darnit, every time I step away I miss something. Good point. I edited in a clarifiction to only contact them after the revolution is well and truly underway. This would be an issue if we were trying to cut Voxx communication off but we're not. Also, I doubt they have a fast, secure line of communication with van Zandt to share the news. By the time the Black Cat communicate the news it's going to be too late, and the duchy's psykers will have spread it already.I doubt it's wise to tip off our plans to anyone, we don't know who they're in contact with.
It will also be very useful in future turns of planning to know what the expense to hire them will be.
I can see arguments both ways. It's the rest of the plan I really care about.
[X] Plan: All in, the straight flush
[X] Plan: Not tipping off our Plans Plan