Karen O’Brien for Quantum Social Change
Investor Due Diligence Report
substackClimate
Exploring the possibilities and potentials of quantum social change for climate action and global sustainability.
3K
210 paid
N/A
Pricing
$8/mo
$80/yr annual option
$1K
210 paid subs
$1K/mo – $1K/mo(±0%)
2.0
8.5
0.35%
(comments + likes) / subscribers
Bi-weekly
0.5 posts/week
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Volts | 93K | N/A | $6/mo | substack |
| Energy Talking Points by Alex Epstein | 57K | N/A | $9/mo | substack |
| The Hotshot Wake Up | 32K | N/A | $6.99/mo | substack |
| David Gelles | 30K | N/A | Free | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Mar 2026 | 3K | $1,335.6 | — |
| Apr 2026 | 3K | $1,335.6 | ~0% |
Platform Dependency
Hosted on substack subdomain
Key Person
Single-author publication — key-person dependency
Revenue Model
Active paid subscription tier
Subscriber threshold
3K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 50 similar-size peers in Climate have paid tiers
Pricing position
$8/mo vs $6/mo category median (186 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $8 | $80 |
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.
| Engagement Rate |
| 43/100 |
| 30% |
| Paid Subscriber Ratio | 75/100 | 25% |
| The Planet 🌎 |
| 15K |
| N/A |
| $8/mo |
| substack |