I think German porn is it's own thing mostly amateur quite different from PB which is definitely not amateur or mainstream, probably considered too extreme or homo with all the DAP dick rubbing! You're not gonna find German actors at PB.
The GGG scenes were available here I guess to test another revenue stream - There have been a number of releases since then but only on DVD, and now they are trying [spam] which I think is a good move. The studio has not changed, still the same GGG crew with some 'professional' (notice the arm band) actors who also work for PB.
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