Is the charge simply usage-based (" pay per click "), or does the charge have to consider the quality of service achieved (for example, response time)?
收费是基于使用情况(“单击一次收费一次”)，还是必须考虑服务所达到的质量(例如，响应时间)？
Pay-per-click advertising is not without its problems-especially "click fraud", the practice of generating bogus clicks for devious reasons, such as making a rival advertiser pay for nothing.
点击付费广告也不是没有缺陷-特别是“点击欺诈”，以某种不正当的原因产生的欺诈性的点击，比如为了让竞争对手的广告失效。
A click meant a successful AD, and some advertisers were willing to pay more for that than a human salesperson could have known.
一次点击就意味着一次成功的广告销售，所以很多广告主都愿意支付更多的、连销售人员也没想到的广告费。
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