I obviously don't know the details of this, but I - and a bunch of friends for whom I bought subscriptions - use Norton Internet Security. They did not renew my subscription (didn't mention it, nor do it). The software started popping up 30-day warnings when the subscription was ending, but at the end of that period, the software shut down.... still no credit card charged. (I bought subscriptions using the newest version, which was substantially less expensive (when on sale) than the upgrade.)
Also, I did go through both the renewal and upgrade processes in Norton, because I wanted to disprove that article. It's as Symantec claims, and was extremely clear to me. Renewing extended the existing subscription, whereas upgrading began the new subscription immediately. They made it clear, and it was not buried in legal print.