Insight Links

Quality Dashboard — TFM vs Growletter Bakeoff
Data Freshness:Mailchimp Exports (Mar 25, 2026)Jake's 4-Tier Scoring (Mar 1-12 sample)Bakeoff CPL Data (Feb 1 - Mar 23)ICP Title Matching (Automated matching)
TFM Primary Subs
3,518
47.8% of total
GL Primary Subs
3,844
52.2% of total
TFM 1P Data Rate
22.7%
+3.9pp vs GL
798 titled subs (excl. retired/student)
GL 1P Data Rate
18.8%
723 titled subs
TFM ICP Matches
263
33.0% of titled
GL ICP Matches
233
32.2% of titled
1

Volume by Newsletter

Primary Subscriber Volume by Newsletter
2

Volume Detail

Newsletter Volume Detail
1P Data Advantage: TFM collects first-party data at 22.7% vs GL's 18.8%. This 3.9 percentage point gap means TFM subscribers are more likely to have verifiable professional credentials.
Volume Note: GL delivers slightly more total volume (52.2% vs 47.8%). However, raw volume without quality context is misleading when the client's advertiser rate is $150 CPL.
TFM Target Rate (All)
33.5%
+12.8pp vs GL
69 of 206 scored subs
GL Target Rate (All)
20.7%
30 of 145 scored subs
CW Quality Advantage
5.5x
TFM 26.8% vs GL 4.9%
IW Quality Advantage
6.9x
TFM 34.7% vs GL 5.0%
DHW Quality
~Tie
TFM 42.3% vs GL 40.6%
GL Excellent Subs (CW+IW)
0
Zero excellent subs
1

Quality Advantage

Target Rate by Newsletter (Jake's 4-Tier: Excellent + Good)
TFM Tier Distribution (All Newsletters)
GL Tier Distribution (All Newsletters)
Key Finding: Under Jake's own 4-tier system, 95% of GL's CW and IW scored subscribers are Medium or Bad. GL had ZERO Excellent subscribers across CW and IW. TFM had 20 Excellent subscribers.
Editable Table: The scoring table below has editable Excellent/Good/Medium/Bad columns. Click any cell to update a value — Target and Target Rate auto-recalculate. Edits persist in your browser.
2

Detailed Scoring

Full 4-Tier Breakdown (Jake's Scoring, Mar 1-12)
TFM Avg CPL
$2.87
Across all newsletters
GL Avg CPL
$3.03
Across all newsletters
TFM Wins (of 18)
9
50% win rate
Mar 20 Sweep
3/3
TFM won all 3 newsletters
1

CPL Over Time

Weekly CPL Trend — All Newsletters Combined
2

Detailed CPL Breakdown

Weekly CPL by Newsletter
CPL Summary: Overall CPL roughly even: TFM $2.87 avg vs GL $3.03 avg. Mar 20 was a TFM sweep (won all 3 newsletters). IW is TFM's strongest CPL category (4 of 6 weeks).
CPL Context: CPL alone says nothing about whether the subscriber is a cardiologist or a retired nurse. The quality advantage (5.5x on CW, 6.9x on IW) means TFM's slightly higher DHW CPL is buying dramatically better subscribers.
Total Titled Subs
1,521
TFM 798 + GL 723
Physician Titles
263
TFM-heavy
Nurse Titles
412
GL-heavy
Executive Titles
238
TFM-leading
1

First-Party Data

1P Data Collection Rate by Newsletter
Title Quality Signal: TFM delivers more physicians and executives. GL delivers more nurses. For a B2B healthcare media company selling ad slots at $150/subscriber, physician and executive titles are the revenue drivers.