The utility lets customers shop because it has no choice. State Public Utility Commissions do not want the utilities to have the monopoly on natural gas supply anymore, and therefore push the utilities to make shopping and switching as painless as possible for customers. The utility does not charge customers for switching, but most Pennsylvania utilities do charge their customers a Gas Cost Adjustment Charge (also called Migration Rider) as part of the distribution charges. This charge is intended to true-up any shortfalls in their default supply pricing and is always included when a customer is not shopping for supply. When a customer does go with a supplier, they continue paying this charge for the first 12 months until it falls off the bill. So while it’s actually an eventual additional savings for the customer, it can look like a new charge depending how it’s itemized.