With Discover, if you purchase gas at GetGo - looking to get the gasperks AND the 5% cashback - be careful. GetGo uses the same merchant code as Giant Eagle and Discover will code it as a Supermarket purchase, so no 5%. You have to call and ask them to adjust the CB credit. They did it for me nice enough but it's a pain to have to call. I would guess it's the same story with Chase Freedom if they go by the merchant code.