We've been seeing plenty of evidence that streaming music services like Spotify, Pandora and Rdio are pulling in more folks than ever, and we now also have a good idea of how that growth is affecting the bottom lines of music labels. In its third quarter earnings report, Warner Music Group revealed that streaming services now account for a full 25 percent of the digital revenue for its recorded music group. As AllThingsD reports, that translates to 8 percent of Warner Music's total revenue for the quarter, or about $54 million in all. What's more, that growth in streaming appears to be a net plus for the company all around, as it's apparently not cutting into traditional sales of digital music (at least, not yet), and is also bigger than the decrease in sales of physical media.