I'm not at liberty to divulge the secrets of our postcard supplier.
In all seriousness, I wouldn't take the postcards as strictly, wholly, entirely InRP. I don't plan on opening up relations with the Keepers and we won't be visiting Minor terribly often. They're meant for a laugh and a little brevity. And lots of cheese.
The Gamma adventure I'll explain since the Jump Hole is clearly visible from the docking point on Freeport 5 and we did have a conversation with a Sail prior to making that trip (and we barged right on in in the typical GMS diplomatically oblique fashion). Minor, on the other hand, while the screenshot was taken in orbit, we won't make that a normal stomping ground and we're not going to be associating with the Order, although we have had encounters with Order vessels in Tau-23 on multiple occasions. I don't really have a "good" explanation for us being there, other than for a laugh.
And just as a general note, all of the postcard shots were taken over the course of a day several weeks ago. If you ever see us outside of the Taus, Bretonia, Gallia, or Kusari, it'll be very rare.