They say that “public” means what “private” used to mean, “added to profile” means what “public” used to mean, and “private” now means that people can’t see the playlist at all even if they have a link to it. But it’s completely unclear which setting controls whether someone can search for the playlist by name and find it. I found out about this public/private change because I somehow got a subscriber to a playlist I’d thought was completely private, so I’m sure the previously private playlists actually did become more public without my permission…

WTF!!! Same here, the playlists are now public

They probably made a good chunk selling your now public playlist music preferences to advertisers.