Yeah. The main purpose of the metric is to compare the relative effectiveness of... | Hacker News

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LordHumungous on Sept 23, 2016 | parent | context | favorite | on: Facebook Overestimated Key Video Metric for Two Ye...

Yeah. The main purpose of the metric is to compare the relative effectiveness of ads. If each number was off by the same amount, that doesn't affect the delta

pbhjpbhj on Sept 23, 2016 [–]

... if there's only one advertiser you can buy placements from!!

Or indeed if all advertisers are using the same misleading metric.

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