You don’t have an account unless you activate it, but they do hold your Instagram handle if you were to sign up that would be your Threads handle. The 50% drop in activity is because the app is lame as hell, and once people saw it they were done. No chronological sorting option, not even an option to only see threads from the people you follow.
The stock Samsung alarm clock allows for songs/albums/playlists from Spotify to be played. Would need to set two different alarms once for weekdays and one for weekends, but they don’t offer gradually increasing sound.