I totally agree with you on the mandatory part, I’d hope it would be widely accepted that opt-in is the way to go in such cases.
Although I need to point out there’s a huge difference between what people say vs what they actually do (see https://www.nngroup.com/articles/first-rule-of-usability-don...) and I can’t imagine an effective product development process that ignores the actual usage data.
Although I need to point out there’s a huge difference between what people say vs what they actually do (see https://www.nngroup.com/articles/first-rule-of-usability-don...) and I can’t imagine an effective product development process that ignores the actual usage data.