If your "service" happened to me I'd be very, Very, VERY ANGRY and if possible (and most of my (online) subscriptions luckily are a "want" and not a "need"), I'd CANCEL the subscription manually (+ look into legal action if your customer would not comply due to periods... which would make me even ANGRIER if not possible and eating up my time), send a VERY ANFRY email to your customer, send them a GDPR deletion demand and (after hopefully having been told after many weeks of simmering waiting time why the &_+@^=~ that happened in the first place) look VERY HARD into cancelling all my other subscriptions in Stripe or moving them to a different payment method.

Not all credit cards are linked to the same account, or have the same conditions.

I usually when possible take advantage of yearly over monthly payments with the associated discounts. That means that it is VERY BAD for me if suddenly without warning possibly HUNDREDS OF EUROS/DOLLARS are siphoned off from the wrong place. (again, not all credit cards have ideal terms!)

Even if I have the funds and buffers, it could potentially wreck some important mandatory payment, which I might not notice in time maybe because of the same meatspace $REASONS I couldn't update the credit card details in the first place!!!

Thanks for the PSA to stay away as possible from Stripe handled subscriptions and that this is even possible, as well as a reminder to review all my subscriptions and my Worst Case Infos for family members.

(throwaway account for privacy reasons)