Fortunately disposable cards can still be used to unilaterally cancel things out when customers are trapped in a maze trying to escape from getting charged.
At the moment this seems to be the most effective mechanism to stop getting robbed.
Some people would argue that you might be in trouble for doing this, but honestly when your time and energy is consumed to the point where your blood starts to boil there's really no other alternative.
I personally do not consume any online recurring subscriptions for this and many other reasons but is common to read nightmarish stories about attempting to cancel a service without any luck.
Hope that things change for the better and courts stop benefiting corporations that do whatever nasty trick have on reach to screw customers.