How would you feel about paying $5 each month for the ability to lock and unlock your car from a distance through an app? What about a $25-per-month charge for advanced cruise control or $10 to access heated seats? What if those charges continued long after your car was paid off? As vehicles become increasingly connected to the internet, car companies aim to rake in billions by having customers pay monthly or annual subscriptions to access certain features. Not content with the relatively low-margin business of building and selling cars, automakers are eager to pull down Silicon Valley-style profits. But...