This is a truly intriguing fare. I really wonder how many are booking and actually flying it.
For those who want to route back to Europe, I think an example like this would be interesting. Immediate ST Elite status in several schemes, fx 111XP with Flying Blue.
Probably still necessary to get a visa to bridge +24 hrs in Jeddah. Or anyone fancying staying in the lounge that long? perhaps not even permitted? Might be there is other days on which one can directly take a flight out again? Very fascinating deal in any case!