Well, some people are OK with getting shitty service once in a while in exchange for drastically lower prices. The thing is, I don't see Southwest prices being drastically lower - I had been checking it for a while when travelling and at least where I go, their price level is no different from their competition - they occasionally have a good deal, but so do the competitors, and their regular prices aren't that different otherwise in my experience. Maybe statistically it's not true but anecdotally for me I'm not sure there's even minimizing expenditure that much...