It's market manipulation and it's covered under racketeering laws.
The Global Alliance for Responsible Media Propaganda and the World Federation of Advertisers need to be dissolved and the korporate executives need to serve hard time.
Hypothetical:’
My little down has a weekly paper with 5000 subscribers.
The big advertisers are a car dealer, a bakery, and a hardware store.
They jointly determine that the paper has taken a pro-trans stand that they refuse to support.
Under your understanding of anti-racketeering law, could the three advertisers be compelled to continue placing ads?