Investor Due Diligence Report
by Heroes of the 21st Century
Green chemistry news, stories and context. Stay up-to-date with the fascinating science that's foundational to our efforts to tackle climate change and achieve a more sustainable future.
1K
~0%
Subscriber count is a platform estimate
Pricing
$5/mo
$50/yr annual option
$442
~100 est. paid subs
$221/mo – $663/mo(±50%)
Previously Weekly
1.0 posts/week
40/100
Variable (~11.1d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| HEATED | 141K | N/A | $8/mo | substack |
| The Crucial Years | 126K | +0.5% | $6/mo | substack |
| Volts | 94K | +0.6% | $6/mo | substack |
| Energy Talking Points by Alex Epstein | 57K | N/A | $9/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Apr 2026 | 1K | $441.67 | — |
| May 2026 | 1K | $441.67 | ~0% |
| Jun 2026 | 1K | $441.67 | ~0% |
| Jul 2026 | 1K | $441.67 | ~0% |
Platform Dependency
Uses ghost platform
Publishing Consistency
Variable publishing frequency
Key Person
Single-author publication — key-person dependency
Revenue Model
Active paid subscription tier
Subscriber threshold
1K subscribers — below the 2K category median (based on 103 newsletters)
Has paid tier
Active paid subscription offering
Peer monetization
100% of 65 similar-size peers in Climate have paid tiers
Pricing position
$5/mo vs $6/mo category median (184 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.
| Component | Score | Weight |
|---|---|---|
| Publishing Consistency | 38/100 | 10% |
| 38K |
| N/A |
| $10/mo |
| substack |