Yes, the journal has been labeled a money-making scam: if you need publications (for your academic career), they'll publish your paper in exchange for large publication fees. The "peer-reviews" are basically token reviews. I don't think there's any larger meaning here about the state of mathematics.
(And as random trivia, the four-color theorem was the first major theorem to be proved using a computer. Based on the headline, I was expecting something like that.)
Neither Marcie Rathke nor the University of Southern North Dakota at Hoople is willing to pay the ‘processing charges’ levied by Advances in Pure Mathematics, so we will never know if the work would actually have made it to publication.
Since publishing is 'valuable' people will appear to offer up 'publiching' as a service. I am surprised that being published in such journals would 'count' in your academic credentials.
See https://www.google.com/search?q=%22scirp%22+scam for some examples.