Flutterby™! :

RealJukebox gathers customer preference information and ships it back to RealNetworks, who claim that they don't store it. The clincher is that they don't mention this fact in their privacy statement or the license agreement. In their defence, RealNetworks officials:

"...said that users could skip the registration and still use the program and that RealJukebox would stop prompting users to register after five attempts. Some customers, they said, had stumbled on this fact and had declined to register."