How is that any different to what Visa and Mastercard can do? Speaking for myself, *every* purchase I make now, no matter how petty, is made with credit or debit-cards which go through their payment networks. The only exceptions are my house' landscaping (still uses paper cheques), buying weed (all my local dispensaries in WA are cash-only due to the federal bank embargo on the legal cannabis industry), or personal transfers over Zelle/PayPal/Venmo - so I'm sure Mr. Mastercard has compiled quite the dossier on me by now.