Does Skype route other people's calls through your system or transfer data off your computer to provide service to other customers? The Spotify model is very different than Skype.

Edit: I had no idea Skype worked like that as well. And I have the same reaction I did when I found out through personal experience that Spotify did that -> ⌘Q - Quit Spotify. I don't need to open my connection to the world and let a program suck up all my bandwidth just to listen to some music I can get from another source. I'm not the only person using my connection and I have other devices that I want to be able to use as much bandwidth as they need. The fact that I can't control that bandwidth consumption at all is bothersome and enough of a negative in my opinion that I won't use the service.