> Your GPS location and driving routes. Of course, some of this is needed to deliver the services described, however it does not need to be stored indefinitely. Waze’s privacy policy states that this information will be used to “create a detailed location history of all the journeys you have made”. The question, of course, is “for whom, exactly?”.
It's for you, and for the Waze community at large. When you drive, your most recent routes are saved and you are allowed to edit some area around your route for some amount of time after. This allows you to update the map both for yourselves an others (new road closure near your house? Mark it on the map), which will affect Waze's routing when giving you directions. Tracking where you've been ensures you only edit areas you're legitimately familiar with.
> To spam you with marketing and advertising materials when using Waze; specifically location-specific advertisements using your GPS history.
These are pretty unobtrusive, and I don't really disagree with them in principal. There are already location-specific ads along my route in the form of billboards and signs.
> To email you marketing and advertising materials
I've never gotten an email from Waze, but I could easily block it if I did. I would only be concerned if they were giving out my email to other third-party advertisers that would be difficult to block.
> To conduct surveys and questionnaires (possibly for others, using your data)
I've seen these a couple of times, they're easy to ignore and dismiss. They only show up when you're stopped somewhere. And they're pretty benign, like "Have you seen one of these brands on the map recently?" (referring to little fast food icons which I find rather helpful)
But the biggest thing to note here is that you can turn off Waze at any time, and if you don't trust it to not use GPS when sleeping, then you can enforce that at the OS level.