Everyone on Facebook HS edition

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Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 1 of 7 AMENDED Exhibit 54 PLAINTIFFS' OMNIBUS OPPOSITION TO DEFENDANTS' MOTIONS FOR SUMMARY JUDGMENT Case No.: 4:22-md-03047-YGR MDL No. 3047 In Re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 2 of 7 Everyone on Facebook HS edition Goal Learn whether school blasts can tip schools from inactive to active via network effects and incrementally increase teen MAP in those schools. Approach What does success look like? How will we measure success? Test variants • EF campaign only (to production) • Sizing EF campaign && presence && privacy change && T2T PYMK && parent demotion (or other feed test?) #todo Schools Finding engaged schools using school data https://fb.quip.com/NnoJAjYFoARd How many schools? CONFIDENTIAL META3047MDL-047-00579227 Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 3 of 7 CONFIDENTIAL META3047MDL-047-00579228 Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 4 of 7 CONFIDENTIAL META3047MDL-047-00579229 Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 5 of 7 CONFIDENTIAL META3047MDL-047-00579230 Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 6 of 7 CONFIDENTIAL META3047MDL-047-00579231 Case 4:22-md-03047-YGR Document 2648-20 Filed 01/20/26 Page 7 of 7 CONFIDENTIAL META3047MDL-047-00579232