Google clearly made a mistake in offering an "unlimited plan" so it makes perfect sense that they're going to discontinue it, and offer 60 days before the data becomes read only. If it was just that, there wouldn't be any article.
The fact that they regret offering an unlimited plan doesn't, however, give them the right to tell him that they're going to give him 60 days before the data becomes read only but it won't be deleted and then suddenly tell him that actually his data is going to be deleted in 7 days, which isn't sufficient time to transfer it elsewhere.