Spotify adds access controls to collaborative playlists

Collaborative playlists are a great way to built mixes with other users on Spotify, but until now you didn't have a ton of control over who could contribute to and see your work. Today, the streaming service is adding new levels of control for those playlists, allowing users to keep closer tabs on who has access to them -- including the ability to share collaborative mixes with large public groups or keeping them private. First, Spotify will give the playlist creator the ability to invite or rem...