On a couple of long ago occasions, I've taken photos of most of the French cars being on display at the Victorian French Car days, some of which were published in Torque. I took many of the ones of 2015 French Car Festival which were in Torque, including the panoramic shot taken of the whole oval. That photo was taken from the top of the embankment with me, for added height, standing on the top of the fence (or was it a post?).
This can take quite a bit of time and the exclusion of 504 cab pics may just come down to who took the photos on the day, how much time they had or the editors choice when compiling Torque. One thing I've been guilty of is not getting the owners names for the various cars on display. All this can take up quite a bit of time. It's unlikely it was deliberate.