Chapter III · Retention
Lucerna
Readers don’t churn — they fade.
12,400 subscribers enrolled · Activity rates over six months
75%
50%
25%
0%
94%
87%
71%
52%
38%
31%
Fade point
Oct
Nov
Dec
Jan
Feb
Mar
This is the
Caravaggio Tenebrism
design system, applied by
Curio Design
— a design-style library for AI agents. Full Caravaggio Tenebrism guide →
designbycurio.com/learn/caravaggio-tenebrism-1606