If customers aren't renewing then they probably don't need the service and forgot they're being charged. It feels unethical to rifle through their online wallet and look for another card to charge.
When we tested this, refunds and chargebacks were actually lower for the recovered cohort compared to baseline.
For customers who really don’t want the subscription anymore, they can still cancel as usual.
I'm okay with you sending me an email before you try, as long as explicit consent is given. However, if I don't care to change my primary card after the first attempt, that means I don't really care about continuing the subscription.
Happy to be wrong if you prove it with the data, though.
Are customers notified when their payment details are changed unexpectedly by your service?