I finally switched to another music site today. I got tired of hearing the same seven or eight songs on Pandora. I have 30 or 40 stations, I've liked hundreds of songs over the last couple years, but Pandora seems to be playing the same seven or eight songs on random (yes, most of the groups are check marked for shuffle). Is this a strategy on their part to get listeners to upgrade and unlock more songs, etc.? If so, it worked. I've now unlocked more songs on my Prime account.