I made a Spotify powered app ( https://mergemusic.app ) and we didn't add any payment methods to comply with their terms.

Tried for months / years to get in touch with someone at Spotify who could discuss a commercial licence agreement, so the app could have a business model. Stonewalled.

Turns out Spotify instead of working with us, made their own version - Spotify Blend, launched 2 years after our app.

The thing that bugs me the most is Spotify is a member of https://appfairness.org which states

> App store gatekeepers have carefully crafted their mobile device ecosystems to eliminate competition and maximize their own control and profits, to the detriment of developers and consumers.

However Spotify's own App Store did exactly the behaviour they are complaining about.