I believe the best way to do that what "mogl" does is by working with the merchants directly, in this case restaurants, and then cashback the customer credit card after a deal has been done.

From my experience as a PCI-DSS project manager for a large airline, issuers would not easily share their customers transactions even if they could.

Therefore I would challenge your question by rethinking on why do you need the credit card data? if it is for a similar use case as "mogl" or if you need the actual transaction for some financial app you may get access to that data by leveraging the "endpoint" of the transaction rather than the issuer.