iCloud Drive
iCloud is not a connected cloud source like Dropbox or Drive, because Apple exposes no API for it. On the desktop app it is a folder on disk, so team sync can point at it, and the app downloads iCloud placeholder files before touching them.
Using iCloud with Aden
iCloud cannot be connected on the web the way Dropbox, Google Drive, OneDrive and Box can: Apple provides no way for other apps to read your iCloud Drive.
On the desktop app it works, because there iCloud Drive is just a folder. In the sync setup, choose Use my iCloud Drive and Aden syncs into it like any other folder. Files you have kept in the cloud to save space are downloaded automatically before Aden reads them, so nothing arrives empty. A file that will not download is skipped rather than uploaded broken.
Catalog transfers
Move a catalog (tracks, albums and everything attached to them) from one team to another in one step, with the record in both teams' activity logs.
Label pitch links
A share link an artist sends to a label carries `?as=label`, which offers the recipient a demo inbox of their own on the page where they are already listening to the track.