企业希望促销活动可能产生积极的后果，但由于一些研究人员能够确定的原因，这种希望并没有得到证实。
Companies' hopes that promotions might have a positive aftereffect have not been borne out for reasons that researchers have been able to identify.
三分之一的商家称他们没有赚多少钱，42%的商家则表示他们不会再进行日交易促销活动。
One-third said they did not make any money from them, and 42% said that they would not do another daily deal.
我们的产品只在商展时展售，而没有办促销活动。
We've only sold our product at trade fairs, not in an on-going sales campaign.
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