Spotify is probably how most Americans were introduced to streaming music over the last four years or so — the service has grown by leaps and bounds since it launched in the US in July of 2011. But a relatively small group of music fans were enjoying pretty much all that Spotify had to offer months before it hit the US. That group was using Rdio, and we’ll now have to find a new option: Rdio will be dead soon, sold off to Pandora in a bankruptcy deal. The service will remain a cautionary tale about the brutality of survival in the streaming music world. A great product is important, but it’s clearly not enough.