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.
Update. It happened again at GetGo on Mayfield. Contacted GetGo:
Your Giant Eagle Response : Case #00745147
Dear Mr. Sxxxxxx, Thank you for contacting Giant Eagle Customer Care. We have looked into the issue at GetGo #3440 South Euclid with our business partners at Discover. It appears that this location was in fact set-up in error as a grocery merchant. Discover has made the correction on their end. We appreciate you bringing this to our attention as well. Discover will be able to credit you for any purchases prior to this correction being made today if you call into their Customer Service. We do apologize for any inconvenience and we value your continued patronage. Very Truly Yours, Giant Eagle Customer Care