CAPI vs pixel-only: server-side recovers ~15% of conversions

CAPI vs pixel-only: server-side recovers ~15% of conversions
Across 50 accounts, 90d:
— Pixel-only: baseline, loses iOS and ad-blocker conversions silently
— Pixel + CAPI (Conversions API, server-side events): 13–18% more attributed conversions, reported CPA drops accordingly
The gain isn't new sales — it's signal Meta was missing, which improves optimization on top of the reporting fix. Match-quality score above 7 is where it pays.
Read: CAPI isn't optional anymore. Pixel-only post-ATT is feeding the algorithm a censored dataset.