A SECRET GOOGLE DEAL LET SPOTIFY COMPLETELY BYPASS ANDROID’S APP STORE FEES

Summary from the TLDR newsletter

Spotify doesn't pay any commission fees when it uses its own payment processor on Android. It only pays a 4% fee when users choose to use Google as their payment processor. Google fought to keep the terms of its deal with Spotify secret during its antitrust trial as it could damage negotiations with other app developers who might want more generous fees. Spotify's unprecedented popularity was enough to justify a bespoke deal.