All of us here at JRM wish to add our voices to the millions mourning the sad death of rock legend Tom Petty on 2 October. A superb songwriter and a towering performer, he had been at or near the top of his game since breaking through with the Heartbreakers in 1977. What's more, he had great compassion, an iron will and a conscience, using them to take on his record co over album pricing (and winning) and, recently, to take up the fight with Spotify over the exploitation of musicians and songwriters. He struggled for the cause - and played live - until his final week on earth. Now songwriter Rodney Jerkins, who wrote a hit for Justin Bieber, has laid bare exactly how little he and his co-writer Andre Lindal earned from streaming sources for their labours, adding fuel to the argument made by Petty and over 100 fellow musicians.