Interesting...
I will say this... I personally have a difficult time without this service due to my listening habits. I am very fond of several stations of theirs. I've had the service on several cars well over a decade. What I always do is take a "promotional deal" (5-6 month for @ $30) I never setup auto-renew! When the time comes to cancel, I allow it to do just that. I then call and make my case. They renew it for the same promo. I begin the cycle again.
For $60 - $70 annually, it is definitely worth it! Anything above that, I'd have to let it go.