Good move. People may be puzzled as to why they are doing this if they make no money off of it, but I bet it'll help with the artist friendly image they are trying to build to dispel the disapproval from old timers who say it'll kill the music industry.
Good move by spotify, and not a bad deal for bands either.
Yep, exactly. Not overtly-company-driven, but beneficial for all three parties - the band, the middle man, and the consumer.