A: Once you hit „Submit“, your address bar reveals your public calendar URL. Share this URL with your friends, so they can get inspired by your preferences.
If you click on your friends’ public calendar URL, their favorited events appear purple, alongside yours in green.
The FAQ states
After submitting my selection, a 64char fragment identifier is added to the URL but when I open it, my selected events dont appear purple or become discernible in any way.