It was mentioned a while ago but I did not see it in the front posts so I thought I would mention again.
Venmo has had a Giant Eagle $10 back on $40 purchase. There is no mention of limits other than the promotion must be active on your account and to check before scanning the QR code (I use the option to open the QR code from the promotion). So far I have done the last 6 days with each tracking.
In addition, the CSP tracks the purchase as online groceries which pays at 3X rewards. Total discount ends up at 28.75%.