A content calendar is not a publish schedule: it binds topic sources, capacity and channel rules. Four layers, five supply lines, and a 70%-80% buffer rule.
Most 'not significant' A/B results are design flaws, not weak creative. 2026 data: low-power tests replicate at only ~28.4%; ~74.2% show no difference.
Public and private domains are halves of one funnel: 150-300 yuan per acquired user vs 20-50 yuan per repeat touch. The chain breaks at four interfaces.
Customer acquisition cost keeps climbing for reasons beyond traffic price: shrinking bid pools, lost signals, longer cycles, weak pages, and uncounted tooling.
Build a private-domain repeat purchase engine in 90 days: hard cost data, three costly myths, a five-step SOP, layered tags and a Reusable 90-day case study.
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