Cartoon Gravity
Investor Due Diligence Report
by Julian Simpson
ghostHealth
Julian Simpson’s public brain
Investor Due Diligence Report
by Julian Simpson
Julian Simpson’s public brain
5K
~0%
Subscriber count is a platform estimate
Pricing
$5/mo
$50/yr annual option
$2K
~500 est. paid subs
$1K/mo – $3K/mo(±50%)
2.9
0.06%
(comments + likes) / subscribers
Weekly
1.6 posts/week
68/100
Consistent (~4.4d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Brain Health Kitchen | 44K | N/A | $20/mo | substack |
| Second Brain | 38K | N/A | $7/mo | substack |
| The Glow Wellness | 33K | N/A | $8/mo | substack |
| Philippa Perry | 28K | N/A | $4/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 3.5K | $1,545.83 | — |
| Mar 2026 | 2K | $883.33 | -42.9% |
| Apr 2026 | 2K | $883.33 | ~0% |
| May 2026 | 4K | $1,766.67 | +100.0% |
| Jun 2026 | 4K | $1,766.67 | ~0% |
| Jul 2026 | 4.5K |
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
5K subscribers — above the 1.5K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 131 similar-size peers in Health have paid tiers
Pricing position
$5/mo vs $6/mo category median (901 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 |
|---|---|---|
| Engagement Rate | 32/100 | 30% |
| Publishing Consistency | 47/100 | 10% |
| Well To Do |
| 16K |
| N/A |
| Free |
| substack |
| $1,987.5 |
| +12.5% |