There is a lot of good information in here. SiriusXM has a few different plans available. Here they are in order of pricing.
Ala Cart (select aftermarket units)
Mostly Music $9.99/MO
Select $14.99/MO
Premier/All Access $18.99/MO ($199/YR) *Yes, 18.99x12=$227.88*
Fun Fact: If you owned the correct vehicle and wanted everything SiriusXM has to offer, you could be paying AS MUCH AS $580 for a single year.
We always have promotional programs available, but they aren't always available for the package/plan that you want. All plans will automatically renew at the then billable rates, regardless of how you initiate your plan (pay by CC/kept on file, pay by check/get invoiced with $2.00 invoice fee*could change.)
SiriusXM has a lot more to offer a subscriber than just audio, we offer unmatched entertainment, and we have data services. (I was coming back from a weekend away and listened to the football games while driving for 6hours on Sunday.) Data services vary from vehicle to vehicle within each brand. Services include Traffic, Travel Link, and Weather.
We also just came to market with Telematics. Telematics is only currently in New Select Nissan products, under the name Nissan Connect powered by SiriusXM.
If anyone wanted to shoot me a PM, I can discuss things privately as well.
Disclaimer: I work as a manager for SiriusXM, but in a position where I do not deal with the public/end user.