B
Evidence Grade B
Graded
under review
Safe to Cite
Recent
46%
46% -- email list growth increase for email opt-in CTA placement (case study) (2025)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
46%
Unit
Percentage
Data Vintage
2025
Entity
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
30
Freshness
95
Source
Jeanne Jennings / Email Optimization Shop
Primary
Tier B
https://emailopshop.com/category/lists/ ↗
Source Article
Lists Archives - Email Optimization Shop by Jeanne Jennings
5 Tips for Better Performing Email Nurture Series
There is a place for email nurture series at all stages of the prospect journey. This post is based on work I recently did for a few clients; in one case the nurture series was the first outreach to people with little or no relationship with the send…
Original Research
Jeanne Jennings / Email Optimization Shop
· Original study ↗
Methodology
Single-brand case study on moving opt-in CTA out of footer; details not stated
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
email opt-in CTA placement (case study): 46% email list growth increase. Source: Jeanne Jennings / Email Optimization Shop (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-list-growth-cta-increase-46pct
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<blockquote cite="https://lighthousedata.io/data/email-list-growth-cta-increase-46pct" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>46%</strong> -- email list growth increase for email opt-in CTA placement (case study)<br><small>Source: Jeanne Jennings / Email Optimization Shop (2025) · <a href="https://lighthousedata.io/data/email-list-growth-cta-increase-46pct" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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