Comment Re:EU GDPR gaining fans outside of the EU. (Score 1) 43
And to answer your question: The best way is to ask your users.
Henry Ford's prospective customers said they wanted a faster horse. And if you ask your users how often you should be asking your users for feedback, they'll probably say never because asking interrupts their immediate task.
What's the GDPR-compliant way to inform users that people who decline to participate in a user survey risk losing access to features?