"Does that mean you're only going to use them on the brochure side of the site?"
Congratulations. You're actually attributing a bit of reason to us. Conversations will be much more productive now. In any case, Mixpanel is easier to integrate on pages with secure data than typekit. There are ways, albeit ways that further narrow our browser compatibility profile.
But I can't get past the idea that you trust Google's scripts with your financial data. They're the single biggest target on the internet; if anyone wants a big score GA is going to be where they hit first. Even 5 minutes serving to GA pages could potentially result in millions of stolen passwords.