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Re:Uber discovered they’d been defrauded out of 2/3 of their... by jacob019 on Monday January 04, 2021 @05:09PM (#25638947)
I would expect:

  ROI > 1 = profitable ad spend
  0 < ROI < 1 = ad spend does not cover its cost
  ROI < 0 = losing money because of the ad spend (the ad is damaging to your brand)

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