Further, it's great to see they're doing it right: it's invisible to the user. No pop-ups, no opt-ins, no alerts. It does its thing, and if you really want to

Further, it's great to see they're doing it right: it's invisible to the user. No pop-ups, no opt-ins, no alerts. It does its thing, and if you really want to opt-out, you have the option to do so.