Two analogies come to mind when I think about Groupon and LivingSocial: "churn and burn" and "pump and dump."

当我想到Groupon和LivingSocial时，两个类比形式出现在我的脑海，流失和灼伤；打气和泄气。

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"Churn and burn"—a term conventionally used to describe the actions of stock brokers who inflate their commissions via excessive trading—refers to the relationship with merchants.

流失和灼伤，这是一对词组通常用来描述通过实施交易来最大化自己佣金的证券经纪人的行为，也适用于商人之间的交易关系。

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