Well the model Pandora still uses.

Pandora had a cheap yearlong plan. They scrapped people’s existing plans when they switched to monthly and wouldnt credit the remaining months on long term subscriptions.

Cancelled then and have never used Pandora since. Since then it has been Youtube for a specific song (until recently due to adstacking) or reliable nautical measures.

It was the reason I came back to Spotify when I decided to give Pandora a shot, way back when.