SiriusXm claimed, in the original article, that somehow buying a Stellantis vehicle committed the customer to the SiriusXm agreement. You get a free trial when you buy the vehicle, and thus using the infotainment system then binds you to SiriusXm's terms. Or so says SiriusXm. Then, when the free trial runs out, they either rebill your credit card if they manage to capture it somewhere, or drop to ad-supported mode.

I’ve seen Sirius pop up ads (like for their radio subscription) in other brand’s cars. I wonder if the two are related.