They used in to deploy projects internally, same for Le Monde. Shipit is not designed to Shipit projects over a lot of servers. It's designed to Shipit small projects or even to ship code on hardware (like raspberry).
I'd guess they use it on their hosted platform.
Would be my guess too, but other than a single PR from one of the core devs I can't find any connection between the projects. Is there any source for this?