I wouldn't worry too much about the nature of the game - in the end, our agency was always a front and cover for our spying in Seattle. At least that's Bobby's backstory with Captain Razak.
Just because we have side income doesn't mean we snoop around in everyone's business.

I'm all for dabbling in artificing - you can do pretty creative stuff with the rules (and I admit, I'm a rules mechanics guy - finding new and unintended interactions are like a hobby for me. Even more so if you can explain them in universe)
Also, agree with Tecumseh, what we do should resonate with the world and be used to create interesting stories.
Bobby does not want to be dragged into dependency again, so he'd do almost anything to make SIS stronger and more independent. If Rachel expresses interest in creating foci herself, she'll have an enthusiastic helper and guinea pig at her side

@Thanee
The reason, I think the upgrade test is meant to replace and not add to an existing focus' force is that availability would suddenly be no longer relevant at all. For my character that would be ideal, but it would lead to the IP question, why anyone would try to get a strong focus in the first place instead of just upgrading it bit by bit.
With that method you could just spend one day to create an F1 Focus and add hits to it every day using the same limit - turning that F1 into F10 within 10 days - just as long as the regular making of an F10 Focus would take. There would be no reason in world to not work itteratively. On the contrary, an F2 Focus could be upgraded to F10 in half the time it would take to forge it in one go.
Having the upgrade require beating your old success total to improve it would allow you to improve a low success focus easily, while still making the high force foci rare and time consuming to create.
Reagents are so cheap, the real cost has to come from the time you need to spend on the creation.