[edm0nd]

every single credit card company does this.

you can literally buy purchase data from Mastercard, AMEX, and Discover and use this data for retargeting and advanced targeting w ads and run them on Facebook and other platforms.

A dog food purchase? Owner likely has pets, serve em a pet ad, etc.

[hrududuu]

Im not aware of card networks selling data like this, but there are other players like Yodlee. I used this data for equity trading.

[poly2it]

Can I buy such data? How anonymised is it? Source?