And there we were thinking self-driving cars were for the noble goal of us never having to drive again :)
"The patent, which was first spotted by TechCrunch, would allow advertisers to offer potential customers a free ride to their place of business. This would solve one of the biggest problems for brick-and-mortar retailers: getting customers to their location. The system would offer free or discounted transportation based on an algorithm-powered decision making process involving the user's current location, the cost of transportation, and the potential profit from a completed sale. The concept is basically a "free ride coupon" and mentioned transportation modes like taxis, trains, buses, or even autonomous vehicles."
From Ars Technica