I am well aware of that, but there is a very huge and crucial difference between putting something in the newspaper for the sake of public dissemination vs. for the sake of making sure one specific known private entity gets the information. The only case I can recall off the top of my head for the latter is for things like service of judicial papers, and even then as a last resort, only when direct attempts to reach the party have failed. I am not aware of a single case where a party that is already reasonably reachable has to monitor public media for private communication.