[kevincennis]

I've actually had decent luck getting Stripe to un-blacklist subscribers that they incorrectly identified as fraudsters.

But it takes a ton of back-and-forth with support reps who generally don't even know or believe you that blacklisting exists (sometimes just an email address, not a specific card, was blocked) – and in one case we didn't get a resolution until the customer got the CA Attorney General to write Stripe's general counsel.