They do

And the numbers are in their favor. They know that lately, more and more pax are buying higher-priced tix for the F product as is; they love the increased revenue stream, and are trying to keep the ball rolling with the announced improvements.

I don't think leisure routes like DCA-NAS would see much paid F, and would imagine more of the same for a while more. Generally, Tempe is doing the right thing in concentrating initially the improvements on routes with a greater likelihood of more paid F pax.