Investor Due Diligence Report
Postcards uncovers how markets and economic systems truly work and simplifies that knowledge so readers can protect themselves, seize alternative opportunities, and think independently in a system that rewards confusion and tries to extract from them.
16K
800 paid
~0%
Subscriber count is a platform estimate
Insufficient data
14 of 30 days needed
Pricing
$20/mo
$200/yr annual option
$13K
800 paid subs
$13K/mo – $13K/mo(±0%)
9.7
14.7
0.15%
(comments + likes) / subscribers
Weekly
1.2 posts/week
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Stephen Leeb, PhD > Turbulent Times Investor | 311K | +7.2% | Free | substack |
| @andrewchen | 255K | +0.2% | $10/mo | substack |
| Linas's Newsletter | 121K | +0.4% | $34/mo | substack |
| Topdown Charts | 53K | N/A | $350/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Mar 2026 | 16K | $14,628 | — |
Revenue tracking starts with your first month of data. More data points will appear as snapshots accumulate.
Platform Dependency
Hosted on substack subdomain
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Revenue Model
Active paid subscription tier
Subscriber threshold
16K subscribers — above the 3K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 147 similar-size peers in Finance have paid tiers
Pricing position
$20/mo vs $1,980.95/mo category average (1205 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $20 | $200 |
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 |
| 51/100 |
| 30% |
| Paid Subscriber Ratio | 57/100 | 25% |
| Lupton Capital - formerly Jonah’s Growth Stocks |
| 43K |
| N/A |
| Free |
| substack |