On the larger topic, I wonder if this is just a scare tactic on behalf of Google to get some number of people to sign up for their monthly fees. My wife got the notice last night and was quite distraught. I could imagine if she didn't have me next to her explaining to ignore it, she may have looked into getting the subscription.
I myself got the notice a few months ago and that was that. I did think about subscribing and may still do so as I have no way to block the ads on my Android machines. And that is wasting a lot of my time waiting for ads to finish running.