“The ongoing tug-of-war between musicians, record labels and digital content providers inched a little more towards artists this week with the introduction of an innovative paid-referral plan from streaming provider Rdio. The new program pays artists a flat $10 fee for every user they refer, a rare form of direct-to-artist revenue in the music streaming business. But it’s only the latest move to renegotiate the flow of money in the world of digital music – and now even Congress is weighing in.”