Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is there any downside to using temporary credit card numbers with subscription services?
You're knowingly providing a payment method which has insufficient funds to meet the terms of the contract, because you are too lazy to comply with the contract. That's unethical and fraudulent behavior. Will you get in trouble? I don't know. I'd suggest getting acquainted with an electronic calendar that can remind you to do things.