I thought California passed a law requiring businesses to allow you cancel your subscription in the same method you signed up. Maybe I misunderstand the bill as written.
I think you're right, but from what I've seen this causes services to make a special cancellation process for CA residents while making everyone else still jump through hoops.
For example, there is no option to cancel a Wall Street Journal digital subscription on the web site, unless you change your billing address to one in California, and then a cancel option will appear.
I made the mistake of subscribing to the NYT. After their cancellation process I've promised myself never to send them another dime in my lifetime. Meanwhile I've had stints of reading WashPo and the New Yorker and would happily resubscribe.