SAS airlines economy extra is a total failure

Took a flight this weekend on SAS and was completely blown away by the stupidity of how they did their seating.  They basically crammed everyone into the back of the plane and left the middle part of the plane empty.  Turns out that the middle section was "economy extra" which they hadn't sold any seats for.  The seats were the same as economy, but you get a meal as part of the deal.  Bizarre.