Hmm, that's odd. Not sure exactly which approval you are referring to, but here is my experience:
The Spotify Web API actually required no approval, because it does not integrate with the user's account.
The current version of my app uses AppleScript, and was approved by the App Store within 24 hours. The next version will use Scripting Bridge, but I don't anticipate that will be an issue.
In the most technical sense, my app is not really an extension to the Spotify app, it is a standalone app that communicates with the Spotify app using Apple Events.
The Spotify Web API actually required no approval, because it does not integrate with the user's account.
The current version of my app uses AppleScript, and was approved by the App Store within 24 hours. The next version will use Scripting Bridge, but I don't anticipate that will be an issue.
In the most technical sense, my app is not really an extension to the Spotify app, it is a standalone app that communicates with the Spotify app using Apple Events.
Hope this helps :-)