But they can't. Because if the user doesn't consent, the advertising network is not allowed to even be involved.
And most sites don't just use one tracking network but they use many (see some of the convoluted cookie banners where you have to turn off data sharing with several hundred "partners")
And most sites don't just use one tracking network but they use many (see some of the convoluted cookie banners where you have to turn off data sharing with several hundred "partners")