The only legit reason Living Social having a huge bump was because it did a $10 for $20 Amazon deal. Kicker is, this wasn't a partnership done by Amazon; Living Social bought those Amazon $$.
"Typically, retailers sell the coupons directly to consumers for the discounted price, and LivingSocial takes a cut, generally 30 percent. But for this deal, LivingSocial bought the gift cards from Amazon and is selling them itself," the Times wrote."
http://www.pcmag.com/article2/0,2817,2376080,00.asp