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Retention
· Growth deck
Key insight
Subscribers don’t churn —
they fade
94.3
%
+12.4% YoY
Monthly retention rate
Source: Basalt Analytics · Q2 2026
n = 127K subscribers
Basalt
07
This is the
Tongan Black Sand
design system, applied by
Curio Design
— a design-style library for AI agents. Full Tongan Black Sand guide →
designbycurio.com/learn/tongan-volcanic-black-sand