Newsletter Insights — advertising rates and audience data for 21K+ newsletters
Browse all →Advertisers are viewing this page. Claim it
Track Rat Park with Carl Erik Fisher's growth
Get notified when subscribers, engagement, or pricing changes
Platform Portability
Uses Substack subdomain (carlerikfisher.substack.com). Migrating would require subscribers to re-subscribe at a new address.
Custom domains let newsletters switch platforms without losing their audience.
Are you a newsletter creator? Get verified insights →
A psychiatrist in recovery explores the addictions in all of us, integrating science, philosophy, and the art of flourishing in recovery. Columbia University bioethicist, author of THE URGE: OUR HISTORY OF ADDICTION, a New Yorker Best Book of 2022.
Data updated Today
| Public |
| Public |
| Public |
| Public |
| Public |
| Public |
| Public |
| Public |
| Public |
350 paid
Weekly Growth
N/A
Paid Subscriber Retention
Insufficient data
18 of 30 days needed
Paid newsletter — revenue data available
Track revenue changes over time
Monitor MRR trends, pricing shifts, and revenue projections
Start tracking — freeJoin thousands of newsletter operators tracking the market
$22–$50
Track CPM rates as they change
Category benchmarks and audience-size adjusted rates
Start tracking — freeJoin thousands of newsletter operators tracking the market
Tracking started recently for Rat Park with Carl Erik Fisher (18 days ago). A growth trend will appear once we have more data points.
The American Psychoanalyst’s Substack
5K subs
Acute Condition
5K subs
Flourish: A Newsletter for ADHD Women
5K subs
Engagement Rate
0.00%
Health category average
Quality Score
Engagement vs Health
Category comparison available
Track Rat Park with Carl Erik Fisher's engagement over time
Monitor quality scores, category ranking, and engagement trends
Start tracking — freeJoin thousands of newsletter operators tracking the market
Track changes to Rat Park with Carl Erik Fisher's percentile rankings in Health over time
Start tracking — freePublishing Frequency
Previously Monthly
Inactive — last post 3 months agoHealth Pricing
$14.36/mo avg
Below average(-44%)
Monetization Readiness
Already monetizing
100% of similar-size Health newsletters also have paid tiers
Track changes to monetization & ad rate insights over time
Start tracking — free