This app was mentioned in 3 comments, with an average of 1.33 upvotes
Erratum: I mean Snapcart (Android) not Cashback.
ELI5:
My friend told me about the app Snapcart You take photos of grocery receipts and you'll get some cash in return.
(I'm not sure if this is available in other countries thought)
There are apps that pay you to take pics of receipts! I forgot yung local one though
edit: The local one is Snapcart https://play.google.com/store/apps/details?id=com.snapcart.android&hl=en