I think there are three factors for this redirection: the Oath/Verizon (probably illegal) interpretation of GDPR that you opt-in once you arrive on their websit

I think there are three factors for this redirection: the Oath/Verizon (probably illegal) interpretation of GDPR that you opt-in once you arrive on their websites; the IAB (deeply arguable) interpretation of GDPR that once you opt-in to one partner, you opt-in to everyone of their partners; and the fact that ad-blockers simply blocked the modal to accept cookies/data tracking/data sharing/etc. Now they simply redirect to advertising.com so that the user is forced to accept every form of tracking before being able to read an article, their emails, a blog, etc.