This is also my number one complaint. I asked about it at their official support forum on getsatisfaction, but never got a response. That's silly, because Spotify sometimes saturated my upstream, in which case I turned it off. It has now become a habit to turn it off. Before that, most of the time, it was one when I wasn't even listening to music, so the bandwidth was completely free to them. If they would allow me to throttle it somewhat, they could use it all the time. Since they don't allow me to throttle it, I've turned to shutting the client down whenever I'm not using it.