My comments as to intelligibility by the educated are limited to the concept of valuable consideration, defined in article 129. I agree that Article 130 in general is a horrid piece of work. The rocks should not be bashed together, but thrown at the draftsperson.
If the argument which I set out above is correct, then the pilot would be flying without the required licence, and so could be convicted for breaching Article 21, and get fined for this.
Although I have no way of knowing the CAA's thinking on this subject, I am inclined to agree with IO540 that, if the CAA ever learned of a pre-planned commercial photo mission of the kind under discussion, they might well prosecute, taking the view that this was a deliberate attempt to fly commercially on a PPL (although, as I have said above, the prosecution could properly be motivated by factors other than revenue protection).