Non-public streams wouldn’t be published without DRM, or at least not as publicly retrievable (i.e. without any authentication) M3U playlists, would they?
Yes - for some of these you can stream if you know the URL, but you're only able to discover the URL after making an account.
Yes - for some of these you can stream if you know the URL, but you're only able to discover the URL after making an account.