No no they think they can use it but they're wrong. You can advertise w.e to me if I wanted it I probably already have it or am saving for it. If I didn't want it before your ad does nothing. Ads only work on simple minded people that can be manipulated. So yea I don't care about my preference data being available worst case scenario is I get ads more likely to be for stuff I want but it's not like it's fucking mind control. They can't make me spend any money.