That's mighty generous of them. Does the mail contain an opt-out link?
Additionally, when I disabled it for my phone (which they didn't email me about), I discovered there's actually ad settings in these place where google was permitting itself (default opt in) to share your phone numbers for "better advertising"
But those ad settings only appear if you go to the settings on the web, not in the phone, which is where they tell you to go.
Would you like to count the dark patterns here?