FlyerTalk Evangelist & Ambassador: China
Join Date: Aug 2005
Location: DEN
Programs: DL DM/MM, UA 1K, AA Exp, HH Dia, WOH Glob, IHG Plat, Marriott Gold, NA EE, Hertz PC
Posts: 17,491
Not sure on DL's algorithm here. It appears sometimes used for tight connections, sometimes just to reward HVCs. Two times I've gotten the Porsche were both in LAX with semi-tight connections, one time it was due to a delay. I've flown into MSP/ATL/JFK with tighter connections and on higher fares but never gotten it then. Go figure.