Cosmographia
Investor Due Diligence Report
by M. E. Rothwell
substackScience
The deep roots of a turbulent world.
12K
840 paid
~0%
Subscriber count is a platform estimate
Pricing
$7/mo
$70/yr annual option
$5K
840 paid subs
$5K/mo – $5K/mo(±0%)
Previously Weekly
1.1 posts/week
50/100
Variable (~6.8d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Aether Pirates of the Matterium! | 97K | N/A | Free | substack |
| The Science of Better | 83K | N/A | $5/mo | substack |
| By the Numbers | 76K | +0.7% | Free | substack |
| The Intrinsic Perspective | 72K | N/A | $7/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 12K | $6,678 | — |
| Mar 2026 | 12K | $6,678 | ~0% |
| Apr 2026 | 12K | $6,678 | ~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
12K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 33 similar-size peers in Science have paid tiers
Pricing position
$7/mo vs $5/mo category median (260 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Apr 2026 | $7 | $70 |
| 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 |
|---|---|---|
| Paid Subscriber Ratio | 75/100 | 25% |
| Humanity United Now - Ana Maria Mihalcea, MD, PhD |
| 72K |
| N/A |
| $5/mo |
| substack |