US Patent 8175235 Lease model for avoiding permanent card locking

Methods relating to prepaid services include determining an unlocked status of an account configured to track usage of prepaid services. The methods further include locking the account for a length of time after the determining step. The methods further include providing, for a service period, a service to a user associated with the account subsequent to the locking step, and continuously extending the locking for an additional length of time throughout the service period.