Now this is only a single anecdotal data point, but the Southwest Airlines flight from Spokane to San Jose yesterday afternoon was only 45% full. That flight is normally 100% packed. The last time I took it was probably 6 months ago and I take it 2 or 3 times each year. It was shocking to see it so empty. I asked the nice flight attendant for a beer with the pretzels; she didn't charge me. As we were beginning our descent into the San Jose, I asked her for the bill. She tapped my shoulder and said "Don't worry about it" which was a nice surprise. Maybe they are trying to keep people flying with free alcohol. Free alcohol in the can is probably more effective than free alcohol wipes at keeping people coming back.
Probably cheaper than alcohol wipes too... if they could find them.