Contour "Pandora" feature - Is it free?

I have used Pandora (free) online through a web browser now and then and just got around to checking it out in the Contour Guide with my Cox CISCO 9865HDC DVR. Clicking on Pandora in the Interactive Services menu brought me to an activation screen with a code to activate the Pandora service through my STB. Being cheap, I have no interest in any added expenses so I didn't go any further as it was unclear whether this service was free or not. The only information I can find on the Cox web site is this statement regarding the Interactive Services accessible with the Contour Guide:

"Services like Spotify, Pandora, Rhapsody, and Grooveshark stream massive libraries of music from their servers, and are available to users for free or for a low subscription price."

Does anyone know if this is a free feature or a paid subscription service?

Thanks,

Ender