Financev9
Profitable Ad Buying
by AtlasCFO
Description
Most 7-figure brands think they need an agency to run their ads. Running ads is a scientific process. The hard part isn't buying ads - it's creating creative.
- Calculate target CAC from unit economics
- Evaluate MER vs platform ROAS
- Detect creative fatigue
- Set cost caps correctly
- Build weekly ad reports
- Troubleshoot spending issues
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Version History
v9
Feb 26, 2026
- Jeff's approved version - weekly creative ritual, smoke test framework, graduation path
v8
Feb 26, 2026
- v10: Complete rewrite from operator perspective - audit framework, creative ritual, spend curve, incrementality
v7
Feb 26, 2026
- Fixed aMER formula: Revenue/Spend not Spend/Revenue
v6
Feb 26, 2026
- MER → aMER throughout
v5
Feb 26, 2026
- ABSOLUTE ceiling emphasis
v4
Feb 26, 2026
- Fixed terminology: gross margin vs contribution margin
v3
Feb 26, 2026
- Updated margins to 55% (Shopify-appropriate)
v2
Feb 26, 2026
- Added incrementality section - when more spend stops working
v1
Feb 26, 2026
- Initial release - CFO-first ad buying system
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