This scares me. Already I frequently receive ads on certain podcast networks that must be based on geolocating the IP of my download--advertisements for area health-care networks that are certainly not nationwide. I've also downloaded episodes from backlogs where (what I assume to be newer) automated ad systems have inserted ad blurbs in a way that scrambles the content or has it played more than once.
I miss the idea of being able to download "podcast001.mp3" and get the same file today that I did 10 years ago; the lack of a canonical source of history seems a loss.