On quite a lot of services the contract term is the billing term, and it just renews every time a successful payment happens. For example a month-long contract

On quite a lot of services the contract term is the billing term, and it just renews every time a successful payment happens. For example a month-long contract that auto-renews monthly. If the payment fails, the current contract simply ends and no debt is created. Obviously: read the terms of what you’re signing up for, to check.