I am sure it will not be a permanent sale, personally I will still take AC because by taking AC my YEG-YZF flight is actually free. I bought a flight pass to use on my YOW-YEG segments to connect with the Northbound flight to YZF. Now it would appear that I can use the flight pass credit to go all the way to YZF from YOW. I had budgeted for 6 flights to YZF this year at $900 return per trip (YEG-YZF) and a NA flight pass to connect. It seems that I will save the $900 on at least 3 of the planned trips.