Opportunity ledger / Dossier O-0455
Recurring need documented in 1 independent public source item.
First seen 2026-06-26 · Last updated 2026-07-19 · Recalculated daily
Trend factor ×0.5, capped at 2.0.
Post title: Global sending calendar for campaigns
对于商业 newsletter 来说,避免在工作时间之外或周末发送邮件会很有用 Chinese research excerpt
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Scoring summary
Evidence confidence = strength × evidence volume × source diversity × payment × competition × trend × 10. Counts use independent content items; only first-hand pain, current spend, explicit willingness to pay and concrete feature requests affect the score. Repeated posts by one author are discounted. Scoring and status changes follow deterministic rules.
“Evidence-backed” means the problem appears real, recurring and connected to spending. It does not mean the business is worth building. Read the full methodology.