This idea that all they do should be de facto standard for the whole world is so démodé.
Visa and Mastercard are very much against FedNow becoming widely used, as it would destroy their business.
There are a lot of people who integrate with them. The issue is that anyone who does so must comply with the PCIDSS. Most hobbyists cant stretch that far and use intermediaries.
>This idea that all they do should be de facto standard for the whole world is so démodé.
I dont know what Brazil's issues were, but Visa and Mastercard show up, they integrate with terminal providers directly and indirectly, and they bring a battle tested data security standard with them. Compared to other industries they are basically self regulating, and in some countries they adopt the PCI DSS into law.