> Opt-in sacrifices this You're right. Opt-in results in a survey population that is self-selected, and therefore largely meaningless. But compulsory participa

> Opt-in sacrifices this You're right. Opt-in results in a survey population that is self-selected, and therefore largely meaningless. But compulsory participation in surveys is deeply objectionable; just because it's easy doesn't make it OK. So you can't have representative telemetry that is also optional (for the user). So firms should stop trying to use telemetry, unless they're OK with telemetry data from a narrow pool of users, e.g. users of Beta versions of software.