A great idea of a product is some sort of unified system for companies to correctly manage subscriptions. There needs to be standards for what makes a user flow acceptable or not when it comes to cancellations.
My spouse got fucked by Shutterstock and we have to have a calendar reminder to cancel this when the year is up, since cancelation prior will result in us still paying out the year, but not getting the remainder of the service.
They're extremely scummy. I could certainly block the charges, but they'd just come after us and cause a headache.