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What do Visa and Mastercard do? An intro to card networks

tautology.town

221–230 of 304 posts

Re: What do Visa and Mastercard do? An intro to card networks

#221
post #215
post #128

Earlier quoted context omitted.

Yes, let's bring the experience of waiting at the DMV or dealing with the IRS to payment systems. Great idea

My experiences with the DMV have actually been pretty decent. I think a lot of their negative reputation is from how it used to be, but that they have improved substantially since then?

Naturally, it varies by state. But yes, the Department of Licensing in WA state is also one of the least onerous bureaucracies I interact with

Re: What do Visa and Mastercard do? An intro to card networks

#222
post #15

In my opinion, the only solution is everyone (individuals as well as corporations) gets a direct account with the federal reserve as long as you can associate a taxpayer identification with the account. Using it is voluntary but it is free of cost, paid for by taxes, and moving money to and from accounts is free of cost. Depositors would get the same overnight interest rate that banks do, and this interest is added e…

Travel and tourism is about 9% of the world economy, and by some measures considered the largest economic sector in the world. Visa and Mastercard will continue to be dominant.

And that's ok. We need an option, it doesn't need to be the only option.

Re: What do Visa and Mastercard do? An intro to card networks

#223

Earlier quoted context omitted.

The EU caps all card interchange fees at 0.3% for credit cards and 0.2% for debit, which is an order of magnitude lower than some of the fees in the US. That’s why you don’t see the same kinds of credit card deals in the EU compared to the US.

I think that there was a recent HN thread that linked to an article which argued that the credit card system of USA has the purpose of taking money from the poor and giving them to the rich, and the estimated amount of the money transferred in this way was huge. The EU limits for card fees prevent this in Europe, which is very good.

Yep, pretty much the credit card tax. One of the most ugly things.

Re: What do Visa and Mastercard do? An intro to card networks

#224
post #106

Earlier quoted context omitted.

As someone who has been hit with fraud on a debit card and a credit card, the process to recover money from fraud on a credit card is so much easier and more hassle-free than a debit card. The big difference is that with a debit card, it's your money that is hit by fraud. The debit card is basically just a proxy. You have to go file a police report. You have to hope the bank will give you the money back. When the cre…

> The big difference is that with a debit card, it's your money that is hit by fraud. I kind of disagree. I think what's happened is the bank would prefer you to believe that . Imagine I kept my money at the bank, and deposited $10000 with the teller. Immediately afterward a robber follows in and steals that $10000 from the teller. Does the bank say "oh no Mr. TheChao! A robber stole your $10000!". I mean, no? The ba…

This was also the subject of a brief sketch on That Mitchell and Webb Look:

> Bank official: Sit down Mr. Coleman, I'm, I'm afraid I've got bad news about your account.

> Mr. Coleman: Really?

> Bank official: I'm very sorry to say that someone's stolen your identity.

> Mr. Coleman: Oh God! Do you know who it was?

> Bank official: Well -- they said they were you, but uh--

> Mr. Coleman: Of course. So, um, what happened?

> Bank official: Well it was on the bank website, someone logged in, and committed identity theft electronically.

> Mr. Coleman: I see. Did they take anything else?

> Bank official: Uh, no.

> Mr. Coleman: Oh good, so all the money's still there...

> Bank official: What?

> Mr. Coleman: Well: it's just my identity that's gone -- none of your money?

> Bank official: Well no, they did -- they, they, emptied your account. It's identity theft, they took all the money.

> Mr. Coleman: That sounds more like a bank robbery.

[continued] -- see https://www.youtube.com/watch?v=CS9ptA3Ya9E for the full skit.

Just as a handy thing to chuckle over and then link others to, if the topic comes up again.

Re: What do Visa and Mastercard do? An intro to card networks

#225
I like the vibe and overall writing style of this blog! Keep up the short little segments. Charcoal Grill and Doing Things Ten Times are my favorites:

* https://tautology.town/2026/02/14/learning-charcoal-grilling...

* https://tautology.town/2026/04/03/ten-times.html

Re: What do Visa and Mastercard do? An intro to card networks

#226
post #220

Earlier quoted context omitted.

https://news.ycombinator.com/item?id=49632470

That’s a list of news articles (notably none about SEPA Instant, the closest analogy to FedNow!), not a response to my point. It actually supports my point: FedNow could be SEPA Instant (if it were to be widely supported and available to retail bank customers), but it’s definitely not UPI, Pix, Wero etc.

> Take SEPA Instant, for example. It’s great for many things, but effectively nobody pays using it in stores or even online.

My link mentions how Wero, replacement for US credit card rails in Europe, is being built on top of SEPA Instant. An adoption tracker is included, to show uptake progress. ~35% of tracked banks in scope in Europe for Wero have adopted it, as of this comment. They are actively building to get off of US credit card rail infrastructure.

In the US, similarly, it will take time to move off credit card rails, but we’ll get there. As mentioned, Walmart is already running live trials for pay by bank. I agree it is not fully operationalized yet, but it will be eventually. The most important primitive already exists (FedNow rails). Everything else is app experience and consumer training (for payment requests and transfers).

I see the pattern between the EU and US credit card -> instant payment transformation journeys, but maybe you don’t. Pix and UPI have shown how easy it is.

(Almost every deposit institution in the US currently has access to FedNow, per the Federal Reserve’s latest participant report, and through those deposit institutions and service providers, their customers)

Re: What do Visa and Mastercard do? An intro to card networks

#227

this article doesn’t do a good job of simplifying. the vast majority of Visa’s revenue comes from one thing called the ISO 8601 / ISO 20022 message, which is the name for a Visa’s authorization. the core service is transmitting this message between an issuer (cardholder bank) and an acquirer (merchant bank). all other revenue streams are basically a microservice on top of this core message transmission service.

ISO 8601 is just a timestamp format. Surely Visa must be using timestamps internally, but that couldn't possibly be their service.

ISO 20022 looks more like it.

Re: What do Visa and Mastercard do? An intro to card networks

#228

Earlier quoted context omitted.

The EU caps all card interchange fees at 0.3% for credit cards and 0.2% for debit, which is an order of magnitude lower than some of the fees in the US. That’s why you don’t see the same kinds of credit card deals in the EU compared to the US.

I think that there was a recent HN thread that linked to an article which argued that the credit card system of USA has the purpose of taking money from the poor and giving them to the rich, and the estimated amount of the money transferred in this way was huge. The EU limits for card fees prevent this in Europe, which is very good.

Do you have a link? Highly interested in that thread. Do you know if people discussed how state solutions faired? I'm assuming something like Pix from the Brazilian Central Bank does an even better job at prevention while providing a public service.

Re: What do Visa and Mastercard do? An intro to card networks

#229

Earlier quoted context omitted.

I think that there was a recent HN thread that linked to an article which argued that the credit card system of USA has the purpose of taking money from the poor and giving them to the rich, and the estimated amount of the money transferred in this way was huge. The EU limits for card fees prevent this in Europe, which is very good.

Wouldn’t it be simpler for European countries to simply raise the VAT and redistribute the proceeds to poor people, rather than regulate the interchange fees if the concern is inequality

Your solution sounds significantly more complicated actually.

Re: What do Visa and Mastercard do? An intro to card networks

#230
post #72

Well I don't really know what they do, but what I know is that Visa transactions costs are 0,22 € out of a payment of 1 €, Mastercard's is 0,23 €, and the French CB network is 0,17 €. All of them do the same : ensure I get the money from the customer. Of course it's a larger project to run this in the whole world, but shouldn't it scale to less along with the number of billions of customers instead of the other way r…

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