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No, they make their money through IAPs.

No one signed up to let Niantic read their email in exchange for free items.

Maybe no one on HN or in your circle of friends, but I think you massively overestimate the average user's sense of data protection.

I'm willing to bet if you put a warning that said "This app will read your email" a ton of people would react. Not 100%, but a ton.

Especially parents.

Okay. They are also selling user data.