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Jeep Introduces Pop-Up Ads That Appear Every Time You Stop
(tech.slashdot.org)
This is a most excellent place for technology news and articles.
Most cars have a SIM card with a very basic data/phone service. In many jurisdictions, it's a legal requirement for cars to have a button to call emergency services, so they need phone connectivity for that. It's also used for software updates, map updates, and of course, data collection.