Gregory B. Sadler - That Philosophy Guy

Investor Due Diligence Report

substackEducation

Philosophy helps people improve their lives, relationships, and careers. I help people study, understand, and apply philosophy This is my site for information, updates, events, offers, and writings about philosophy, as well as videos and a podcast.

View full profile →Download PDF

Key Metrics

Subscribers

600 paid

Verified

Weekly Growth

N/A

Revenue Analysis

Pricing

$6/mo

$60/yr annual option

Est. Monthly Revenue

$3K

600 paid subs

$3K/mo – $3K/mo(±0%)

Quality & Publishing

Audience Quality Score

90Good

0100

Publishing Pace

Previously ~4x per week

3.9 posts/week

Publishing Consistency

73/100

Consistent (~2.1d avg)

Competitive Landscape (Education)

Newsletter	Subscribers	Weekly Growth	Price	Platform
AlgoMaster Newsletter	149K	+0.4%	$29/mo	substack
All About Psychology	123K	+3.5%	$5/mo	substack
The Next Big Idea Club Book of the Day Newsletter	90K	N/A	$10/mo	substack
System Design Classroom	58K	N/A	$8/mo	substack

Revenue Trajectory

Estimated monthly revenue over time

Month	Subscribers	Est. Revenue	Change
Feb 2026	6K	$2,862	—
Mar 2026	6K	$2,862	~0%
Apr 2026	6K	$2,862	~0%

Risk Assessment

Key risk factors for due diligence

High

Platform Dependency

Hosted on substack subdomain

Low

Publishing Consistency

Regular publishing schedule

Medium

Key Person

Single-author publication — key-person dependency

Low

Revenue Model

Active paid subscription tier

Monetization Readiness

Monetization status

Subscriber threshold

6K subscribers — above the 2K category median for first paid tier

Has paid tier

Active paid subscription offering

Peer monetization

100% of 80 similar-size peers in Education have paid tiers

Pricing position

$6/mo vs $5/mo category median (489 newsletters)

Pricing History

Date	Monthly	Annual
Mar 2026	$6	$60

Data Quality

Report Data QualityPartial - Some metrics estimated or missing

Subscriber Confidenceverified

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.