Books Worth Reading
Investor Due Diligence Report
substackCulture
The best books about everything.
209K
17.8K paid
-1.3%
+2.0%
net growth
Pricing
$6.99/mo
$69.99/yr annual option
$99K
17.8K paid subs
$99K/mo – $99K/mo(±0%)
9.3
145.2
0.07%
(comments + likes) / subscribers
Weekly
1.7 posts/week
76/100
Consistent (~4.4d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| The Parnas Perspective | 803K | +0.1% | $6.49/mo | substack |
| Dracula Daily | 241K | -0.4% | $8/mo | substack |
| This Day In History | 159K | +2.9% | $5/mo | substack |
| In Retrospect with Frederick Joseph | 95K | N/A | $7/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Mar 2026 | 141K | $66,657.87 | — |
| Apr 2026 | 177K | $83,676.9 | +25.5% |
| May 2026 | 206K | $97,386.68 | +16.4% |
Platform Dependency
Hosted on substack subdomain
Publishing Consistency
Regular publishing schedule
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Subscriber threshold
209K 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 Culture have paid tiers
Pricing position
$6.99/mo vs $5/mo category median (3615 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $7 | $70 |
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 |
|---|---|---|
| Engagement Rate | 39/100 | 30% |
| Paid Subscriber Ratio | 100/100 | 25% |
| Growth Consistency | 0/100 | 15% |
| Publishing Consistency | 62/100 | 10% |
| Rob Brezsny's Astrology Newsletter |
| 79K |
| N/A |
| $5/mo |
| substack |
Revenue Model
Active paid subscription tier