There's also a targeted elite offer. See below.
"Plus, you have been selected to receive a special Elite offer. The mileage match awarded by Northwest car rental transactions made between October 1 and November 30, 2003, will count toward your 2004 Elite tier qualification. To qualify for this special offer, the October and November car rental transactions must be received by Northwest from the car rental partner by December 29, 2003. Please be sure you request your WorldPerks miles at the time of rental car pick-up (since the mileage match on retro-credit requests will not count toward 2004 Elite tier qualification if they are received by Northwest on or after December 30, 2003 ).*"