The 100 Days
Investor Due Diligence Report
by The 100 Days
substackHealth
politics, Russia, medicine and life.
7K
700 paid
N/A
Pricing
$5/mo
$50/yr annual option
$3K
700 paid subs
$3K/mo – $3K/mo(±0%)
1.4
28.9
0.43%
(comments + likes) / subscribers
Bi-weekly
0.4 posts/week
44/100
Variable (~18.4d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| The Forgotten Side of Medicine | 343K | +0.3% | $7/mo | substack |
| Neuroscience & Wellness | 241K | +4.5% | $7.99/mo | substack |
| Nedra Nuggets | 151K | -0.3% | $6.99/mo | substack |
| COVID Intel - by William Makis (McGill Medicine) | 142K | N/A | $7.5/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 7K | $2,782.5 | — |
| Mar 2026 | 7K | $2,782.5 | ~0% |
| Apr 2026 | 7K | $2,782.5 | ~0% |
Platform Dependency
Hosted on substack subdomain
Publishing Consistency
Variable publishing frequency
Key Person
Single-author publication — key-person dependency
Revenue Model
Active paid subscription tier
Subscriber threshold
7K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 128 similar-size peers in Health have paid tiers
Pricing position
$5/mo vs $6/mo category median (918 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $5 | $50 |
Disclaimer: This report is generated automatically based on publicly available data and proprietary estimation models. Estimated subscriber counts are derived from engagement patterns and should be verified through direct disclosure. Revenue estimates are based on known pricing and estimated paid subscriber counts. This report is for informational purposes only and should not be the sole basis for investment decisions.
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Engagement Rate | 52/100 | 30% |
| Paid Subscriber Ratio | 90/100 | 25% |
| Publishing Consistency | 10/100 | 10% |
| Unbiased Science | 124K | +0.4% | $5/mo | substack |