Received offer from car dealership during service. Sent in $5.00, finally received redemption vouchers after many attempts to reach company. Have been mailing in gas receipts since November - letters keep coming back "Refused - unable to forward". E-mail to customer service is returned as a message of non-delivery. Even at $5.00, a BIG RIP-OFF, considering how many $5.00 this company must have received.