Mike Hogan，一家建立在旧金山的公司-ZiXXo的老板，说他“正在瓦解现存的优惠券系统”这个系统在美国被Valpak 和 Valassis这样的公司掌控着。
Mike Hogan, the boss of ZiXXo, a start-up near San Francisco, says that he is “disrupting the existing coupon system”, dominated by companies such as Valpak and Valassis in America.
无论使用何种系统，除非您已经做了优惠券促销并可以计算出优惠券的数量，跟踪是评估广告有效性的唯一办法。
Whatever system you use, unless you've done a coupon promotion and can simply count the number of coupons redeemed, tracking is the only way you can assess how effectively your advertising is working.
该系统还会提供一些零售商的优惠券和其它信息，另外它还能帮你找到停车位。
The system will offer coupons and information about retailers, plus help find parking.
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