Begs the question: Why isn't opt-out "useless" Perhaps because only way to get large sample size is to target users who are unaware of "defaults", i.e., remove

Begs the question: Why isn't opt-out "useless" Perhaps because only way to get large sample size is to target users who are unaware of "defaults", i.e., remove choice Perhaps when forced to make a choice ("opt-in"), users will not choose to share data (unless the developer uses dark patterns to manipulate the choice) Why is that