Short version: MSP-DEN oversold by two on the previous flight... and on our flight. My ticket (one-way) was $540 (last minute) MSP-DEN-AUS. They offered a full refund + $300, a flight that night to STL via MDW, a hotel night at the airport Marriott in STL, and completion of the trip home STL-DAL-AUS the next morning. $840? Done. I couldn't ask for better than this - is it normal VDB comp from WN?