III
Reader Retention · Cohort Decay
07
Cohort Analysis · 24-Month Trailing
Subscribers never cancel — they fade.
Average articles read per active subscriber across six-month cohort window, Intaglio readership data
50
25
0
Healthy
threshold
47
42
35
28
19
14
−70% engagement loss over six months
Month 1
Month 2
Month 3
Month 4
Month 5
Month 6
articles per subscriber
This is the
Penny Black Stamp
design system, applied by
Curio Design
— a design-style library for AI agents. Full Penny Black Stamp guide →
designbycurio.com/learn/penny-black-stamp-1840