Thanks a lot. As an unrelated follow-up, I searched for the spotify API and found that spotify changed their criteria for Web API Extended Access last year. I suppose this will not affect your app, since existing API users can continue to use it. Would the new rule affect you if you were just starting to develop this app?

Yes, that change was actually the reason I went with "users create their own Spotify app" approach. With the new criteria, getting extended quota as an indie dev is tough – Spotify wants commercial partnerships or big user numbers.

By having users create their own developer app, each user has their own quota and I stay out of the approval process entirely. Works well for a niche app like this.

More context here: https://community.spotify.com/t5/Spotify-for-Developers/Upda...