As an ex-journalist with background in the arts (14 years of visual art and/or pop music criticism) and as a current multimedia project manager/editor for a large luxury retailer, Christophorus makes total sense to me.
It's editorial and advertising aims are multifaceted:
- reinforce Porsche's history as a sports car manufacturer
- demonstrate how pervasive and influential the Porsche brand is in popular culture
- document how the Porsche brand permeates many of the walks of upper-class life across the globe (i.e., not just in Europe or the U.S.)
- contextualize current and future Porsche products and initiatives with all of the above in mind
It's perceived demographic is, as some have noted, quite socioeconomically and educationally high. Keep in mind that the average price of a Porsche is, IIRC, right at six figures, and as a general rule the ratio of new-vehicle price to annual income is 1:2 (i.e., someone who earns $200k a year will spend $100k on a new car) -- and that the typical Porsche owner likely owns multiple luxury vehicles.
Also keep in mind that the average Porsche owner is likely someone who is not aware of Porsche's history, both in sports car production and in motorsport -- this is a paradigm shift from 10-15 years ago -- but who is likely to appreciate and value that history once it's learned.
Christophorus is very much a lifestyle magazine themed around the Porsche brand.