I would also argue that the pre-Christmas spike likely isn't because people are cheap. I think the main factor is that most people spend the holidays with family. Two possibilities come to mind: 1) one or both of the people in the relationship decide that the relationship is not worthwhile enough to take each other home to Mom and Dad, or 2) meeting the family over Thanksgiving leads to a breakup (it was awkward, the family didn't like the S.O., the S.O. didn't like the family, etc.).
All-in-all, I agree with the sentiment of several comments here that between the poorly-ripped image and the unjustified conclusions they jump to, the article is mostly crap.