What do Visa and Mastercard do? An intro to card networks @ tautology.town Rather than issuing cards or managing bank accounts, these payment rails route transaction messages between issuers and merch

What do Visa and Mastercard do? An intro to card networks @ tautology.town Rather than issuing cards or managing bank accounts, these payment rails route transaction messages between issuers and merchant acquirers, coordinate daily fund settlements, set fee incentives, and enforce dispute resolution rules. https:// tautology.town/2026/06/01/card -networks.html