I use privacy.com virtual cards. I make a card for each vendor, and define a limit for it. I can kill the cards anytime.
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.