{"page":"/blog/made-for-advertising-sites","modified":"2026-11-10","license":"https://creativecommons.org/licenses/by/4.0/","columns":["Period","MFA measure","Value","Source"],"rows":[["2023 study","Share of impressions on MFA sites","21%","ANA Complete Report, Dec 2023"],["2023 study","Share of spend on MFA sites (range by advertiser)","15% (0.13% to 42%)","ANA Complete Report, Dec 2023"],["2023 study","MFA share of spend in PMP deals vs open market","14% vs 19%","ANA Complete Report, Dec 2023"],["Q2 2025","Median MFA spend; top-quartile maximum","0.8% (from 2.3%); up to 28.7%","ANA, 14 Aug 2025"],["Q3 2025","MFA share of spend","0.39%","ANA, 5 Nov 2025"],["Q1 2026","MFA exposure","1.1% (0.4% to 0.6% through 2025)","ANA, 27 May 2026"],["Q1 2026 data","AI slop share of open-web spend; overlap with MFA","1.3% to 2.4%; 88%","Fiducia, 10 Aug 2026"]],"sourceUrls":[["https://www.adslot.com/wp-content/uploads/2023/12/ana-programmatic-media-supply-chain-transparency-study.pdf"],["https://www.adslot.com/wp-content/uploads/2023/12/ana-programmatic-media-supply-chain-transparency-study.pdf"],["https://www.adslot.com/wp-content/uploads/2023/12/ana-programmatic-media-supply-chain-transparency-study.pdf"],["https://www.ana.net/content/show/id/pr-2025-08-programmatictrans"],["https://www.ana.net/content/show/id/pr-2025-11-transparency"],["https://www.ana.net/content/show/id/pr-2026-05-programmatic"],["https://www.fiducia.eco/post/ana-tag-fiducia-analysis-quantifies-level-of-ai-slop-in-digital-advertising-supply-chain-for-first"]]}