[slededit]

The car may be ready 24/7, but humans have a nasty habit of all wanting to travel at the same times. In reality the vast majority of trips will happen at rush hour and most cars will sit idle the rest of the day.

It’s brand suicide to not have a car when needed so fleets will be sized for peak load. When you apply queuing theory none of the numbers seem to add up.

[yourapostasy]

The numbers for just driving around and getting paid for the drive might not pencil out. But if you include the real time data about who (for payment purposes), intended destination, origin, and historical trips, that represents data advertisers will pay handsomely for.

If an advertiser tried to entice people to place a tracking device in their cars today for a reward, that would go over like a lead balloon. But Waymo will get people to pay for the tracking data and enjoy the riding convenience, while vacuuming up insights into consumer behavior at granularities that are the story elements of Black Mirror episodes. Advertisers are salivating at sending targeted offers that add pinpoint location and time to the axes they can already select upon.

While a teeny bopper rides, the screen screams out a BOGO offer to buy “the latest Kardashian shoe just 10 meters from your destination, press the Buy It Now button in the next 30 seconds and we’ll have both shoes ready for you in your size for immediate pickup at our entrance including a FREE gift $100 value for true Kardashian collectible fans! BE Kardashian Glamorous Tonight!”

[tlb]

Uber and Lyft have all that data about their customers today, and could monetize the same way. Maybe that's a significant additional revenue stream, but it's orthogonal to whether the cars are self-driving.