1) The document discusses various examples of large companies like Chase, P&G, and Restoration Hardware cutting digital ad spending with no impact on performance, indicating ad fraud.
2) Uber sued a mobile ad agency for $82.5 million, alleging ad fraud based on discrepancies in reported clicks vs actual users.
3) The author argues that without 100% measurement, advertisers are not getting what they paid for due to widespread ad fraud issues like fake inventory, bots, spoofing, and non-viewable impressions.
4) Targeting and advanced ad metrics like geolocation are often faked or ineffective at reducing fraud.
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