XMSirius just changed their terms and subscriptions are no longer cancelable or refundable starting 3/15/24, even if you sell your vehicle and have no way to use the account.
That's absurd and untrue. They're decreasing when you can get a prorated refund. So (aside from a initial window) when you cancel midterm you don't get money back. That's not great but that's a far cry from removing the ability to cancel a subscription.
They're already being sued for their cancelation process being an utter pain in the ass, removing the ability to cancel would be tossed out immediately.