Car companies want to make billions by charging monthly fees for features like heated seats — and electric cars makes it easier than ever

• Electric cars are less profitable for automakers than gas-powered ones.
• That means auto companies have to make up that margin elsewhere.
• Automakers could be looking to upsell EV-buyers with added features.

Pricey add-ons could start ruffling EV-buyer feathers — but automakers might struggle to survive without them, a new study said.