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> GDPR-Friendly

> Opt-Out

I don't think thats how it works

It is also missing "Delete my data" and "Download my data" options.

A good point!

How do you access data that's held about you by/in Google Analytics, anyway?

Not sure about accessing collected data, but you can delete user data from Google Analytics using User Deletion API (https://developers.google.com/analytics/devguides/config/use...)