Investor Due Diligence Report
The place for mathematical puzzles and the puzzling community. Two new puzzles every Friday morning!
7K
490 paid
N/A
Insufficient data
16 of 30 days needed
Pricing
$8/mo
$80/yr annual option
$3K
490 paid subs
$3K/mo – $3K/mo(±0%)
7.7
6.3
0.20%
(comments + likes) / subscribers
Weekly
0.9 posts/week
76/100
Consistent (~8.3d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| CRAFT TALK | 51K | N/A | $10/mo | substack |
| Narratively Academy | 27K | N/A | $15/mo | substack |
| The West Point History Professor | 22K | N/A | $8.5/mo | substack |
| Tech in Ed | 22K | N/A | Free | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 4.5K | $2,003.4 | — |
| Mar 2026 | 6K | $2,671.2 | +33.3% |
| Apr 2026 | 7K | $3,116.4 | +16.7% |
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
7K subscribers — above the 1K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 69 similar-size peers in Education have paid tiers
Pricing position
$8/mo vs $14.27/mo category average (486 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.
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Engagement Rate | 50/100 | 30% |
| Paid Subscriber Ratio | 75/100 | 25% |
| Publishing Consistency | 56/100 | 10% |
| Play Makes Us Human |
| 20K |
| N/A |
| $5/mo |
| substack |
Revenue Model
Active paid subscription tier