Delta SkyMiles members can earn 250 Medallion Qualification Miles (MQMs) for qualifying stays of two nights or longer at any Hilton property through Dec. 13, 2013.

Registration is required at http://HHonors.com/DELTAMQM and select Delta Air Lines as your preferred partner and points and fixed or variable miles as your earning type.

Bottom line: Members can normally only earn MQMs through flying and a limited number through credit card spend but for a limited time, members can earn up to a maximum of 10,000 MQMs with this offer. However, it may take up to six weeks for the MQMs to be credited to your account.