I tried it. Why did they have to send me an email containing my quotes, versus just displaying the quotes on a results page? That seems particularly un-Googley. I hope my email address is not shared with any third parties.
Now, if you select a quote, then I imagine your email would be shared and a $xx commission would be paid to Google. Curious to review the terms or see the business heuristics.
https://www.thezebra.com/ <kind of> does it.