B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
5%
5% -- verified mark certificate adoption rate for Newsletters at The Newsletter Conference (2025)
5% of attendees at The Newsletter Conference had purchased a certificate to get their logo into Gmail inboxes.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
5%
Unit
Percentage
Data Vintage
2025
Entity
Sample Size
400
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Inbox Collective
Primary
Tier B
https://inboxcollective.com/5-newsletter-trends-im-watching-this-year/ ↗
Source Article
5 Newsletter Trends I’m Watching this Year
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As 2025 rolls on, one big obvious to…
Original Research
Inbox Collective
· Original study ↗
Methodology
Domain scan of conference attendees
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Newsletters at The Newsletter Conference: 5% verified mark certificate adoption rate. Source: Inbox Collective (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/newsletter-conference-vmc-adoption
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<blockquote cite="https://lighthousedata.io/data/newsletter-conference-vmc-adoption" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>5%</strong> -- verified mark certificate adoption rate for Newsletters at The Newsletter Conference<br><small>Source: Inbox Collective (2025) · <a href="https://lighthousedata.io/data/newsletter-conference-vmc-adoption" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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