Earlier quoted context omitted.
If other cloud platforms can trust and accept them why on earth can't GCP?
Probably because they're easily stolen and popular for fraud. I'm never going to blame someone for not trusting credit cards. Only if you don't trust them, you should offer a better alternative.
Google should know that credit cards can get leaked/stolen. Suspending an account without notification is not the right solution. At least give the customer a chance to defend itself, change payment methods or switch to a different platform.