Opt-out
Okay, so the "decent human being" bit of my brain just wanted to scream and rage upon reading this.
The analytics side has another take: How will I opt out?
If I am in the EU (assuming this thing takes off and goes global), I might not want my data flowing through someone else's Wi-Fi. Especially if the organisation orchestrating that flow is Google. Especially especially if revenue is based on "other factors" (ie: how much data they can mine out of it).
How on earth can this play nicely with GDPR?