And by being the CDN for the fonts, they get to see all sorts of
interesting information about which websites each ip goes to ;)

njh

Slight correction: By being /A/ CDN they get to see all sorts of interesting information which websites each ip goes to. Of course that's even more true of Google search, analytics, etc.
They will not, of course, be able to tell where the fonts are viewed if you clone their repo on github... ;) 
To be clear, I am not suggesting we link to Google's CDN for the website font. I think we are probably just fine hosting the chosen font(s) on the inkscape.org website.

-C