This trope really needs to die. If people were treated like products they wouldn't use Google services. Google has to treat users as customers, and indeed does sell a lot of stuff to them (services, apps, hardware). If it didn't the users would go somewhere else and Google would die.
This is obvious. The situation is simply more complex than the trope makes out. Unless you can get past the trope we can't really discuss Google in any meaningful way. There are problems, but not "you are the product".
Basically, Google provides a service for FREE. Users use said service, and Google collects information about said users. Google sells information to their customers, who pay good money to advertise and analyze those users. Money goes into Google's pockets, paying engineers and providers to provide the service.
They key here is that Google provides the services for free. But the quid-pro-quo is that Google collects information about the users so they can sell that information to advertisers and anyone else who will pay for it.
Users currently value their privacy at less than free - they'd rather use a free email provider than pay some money. That's why Google is where they are - they sell you to other people. And for the most part, you don't care as long as Google gives you free stuff.
You want to create a mailing list with people who agree to receive such mailings? Just set up a sweepstake in a local mall over a weekend. Give away some $50 item and by the end of the weekend, the box will be full of names, addresses and phone numbers. Even better, all that is likely legit, since you probably will call the winner, and will mail the prize to them.
Anyhow, the other worry with such information sent to Google is well, it's a lot easier to subpoena that information from Google, who does not have to protect your Amendment rights, than it would if the information was in your control. Throttle position is useful to see if you were braking or trying to avoid the accident, or were street racing, etc.
Face it, it's going to be a law enforcement goldmine.