SAA JourneyBlitz is a con. Here's proof!!!

How is it possible that I can book a 1 way flight from Durban to ORT as a non frequent flier - R891 (which means I have no loyalty to SAA) for cheaper than I can book on JourneyBlitz AND use up some of my miles (R979 + 3700 Voyager miles)???????

This JourneyBlitz is a con or does SAA think we are too stupid to notice?