This claim in the Forbes article doesn't make sense to me: "It doesn’t need the money but it does want to learn from how riders interact with a service they are paying for."
Alphabet has been pressured to show more tangible financial results by activist shareholders[1]. Waymo has 2,500 employees. Waymo's annual budget for headcount alone include stock based compensation is over $1B by my estimate.
[1] https://www.ft.com/content/6daa5d29-8595-4630-a633-eb1f8b138...