This holiday season, Delta SkyMiles members who purchase or renew a one-year or three-year Sky Club membership through Dec. 31, 2012 can get two additional months free with promotion code SC2MO or 1,500 Medallion Qualification Miles (MQMs) with promotion code SCMQM. You may renew before your current membership ends to take advantage of the offer and your new membership will be added to your existing term. Visit http://insideflyerus.wpengine.com/link/?7732

Bottom line: For base members, a one-year Delta Sky Club membership is $500, and a three-year membership is $1,265. A one-year membership earning 1,500 MQMs will come at a cost of $.33 per MQM–compare this to earning nearly 5,000 MQMs with a single LAX-JFK $300 roundtrip flight with an MQM earning rate of only $0.06 per mile. So this deal is best used by those who are already planning to purchase lounge membership.