I too was promised $500.00 in free gas with the the purchase of 4 Big O Tires or Brand name tires. Send $100.00 in gas receipts along with the monthly gas voucher and receive a $25.00 gift card from the gas station you picked. I feel really lucky after reading some of the complaints. I started sending my receipts in May 2008 and have received 6 of the $25.00 gift cards. We sent our receipts by register mail but now we just receive the receipts back undeliverable. But we are still sending our receipts in every month to uphold our end. Does anyone know of a class action lawsuit against this company???