«Software Notebook: Microsoft Zune doesn't do 'PlaysForSure'»(en inglés). 17 de septiembre de 2006. Consultado el 9 de octubre de 2014. «Microsoft says the device won't play tracks or albums bought through existing music services affiliated with its own Windows Media "PlaysForSure" initiative. Those services -- such as Napster, MTV's Urge and Yahoo Music Unlimited -- have been partnering with Microsoft and device makers to try to challenge Apple Computer's iPod and iTunes juggernaut.
The PlaysForSure program and music services will continue even with the Zune's launch, Microsoft says. But analysts say the rise of the Zune, and the device's incompatibility with the PlaysForSure services, promise to further reduce the potential market for those Microsoft partners.»
