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FTC’s click-to-cancel rule has been struck down by federal judges at the eleventh hour
(www.engadget.com)
This is a most excellent place for technology news and articles.
This is the FTC's rule, but nothing prevents each and every state from implementing a law to do the exact same thing, except slightly differently than every other state, making it extremely costly for the companies to implement.
The problem with subscription services is that it's fairly easy to argue it's interstate commerce that states don't have jurisdiction over.
States have argued successfully to tax cross state commerce. That's why you get charged local sales tax even when ordering from a company that does not have a presence in your state. I don't see this as any different, but someone will need to go first to set the precedent.