I think I see the confusion. Correct me if I'm wrong.
I think you interpreted the description of the journal to mean that the journal would let anyone publish, if they would pay a $5,200 fee.
Instead, the journal is an open-access journal, meaning that anyone can read the articles without paying a fee. They offset their costs by charging the authors a publication fee if their work is accepted by the editor after peer review. I'm not saying that I like this business model, but it's fairly standard.
As an aside, by your own math this journal is in the top 2% of all publications. Plenty of people across disciplines would be very happy to publish in this journal.
I think you interpreted the description of the journal to mean that the journal would let anyone publish, if they would pay a $5,200 fee.
Instead, the journal is an open-access journal, meaning that anyone can read the articles without paying a fee. They offset their costs by charging the authors a publication fee if their work is accepted by the editor after peer review. I'm not saying that I like this business model, but it's fairly standard.
As an aside, by your own math this journal is in the top 2% of all publications. Plenty of people across disciplines would be very happy to publish in this journal.