"their opt out preferences"
The problem is all in the "opt-out" model. It should be opt-in only. So if you don't see a cookie or any other data allowing you to see I've opted-in, it's obvious I don't want you to meddle with me at all.
The problem is all in the "opt-out" model. It should be opt-in only. So if you don't see a cookie or any other data allowing you to see I've opted-in, it's obvious I don't want you to meddle with me at all.