Nothing is being sold and all other articles on the site are about photography.
Your heuristic for identifying scam articles is overtuned and you're deferring to shallow dismissal instead of engaging with the article to your detriment.
even if nothing is being sold, the fact that the author went to so much trouble to write umpteen paragraphs of dross, but didn't bother to transcribe the actual useful information. I may not be suspicious, but I am annoyed
Your heuristic for identifying scam articles is overtuned and you're deferring to shallow dismissal instead of engaging with the article to your detriment.