• But I guess it is “ethically” sourced as they kinda asked by making it opt out, I guess.

    No.

    As your mother’s case shows, making it “opt out” is emphatically not the ethical choice. It is the grifter’s choice because it comes invariably paired with difficult-to-find settings and explanations that sound like they come from a law book as dictated by someone simultaneously drunk and tripping balls.

    The only ethical option is “opt in”. This means people give informed consent (or if they don’t bother to read and just click OK at least they get consented hard like they deserve). This means you have to persuade that the choice is good for them and not just for the service provider.

    TL;DR: Opt-in is the way you do things without icky “I don’t understand consent” vibes.