>It was over a month of back-and-forth, so I threw my hands up and released it audio-only for now. What we will do is bundle the MIDI build into the binary so both AUv3s install.

Oh, so they are trying to do a soft bait and switch; where an app developer makes an app, splits its functionality, and sells both on the app store. They hope that someone buys the first app, which is missing basic functionality, not realizing they have to buy a second app to get the additional expected features. Like if you buy a video converter app that doesn't let you convert to an MP4 unless you buy a second "MP4 version" video converter app. Scummy behavior, glad Apple blocked it.