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The title uses the spelling “VISA”. It's actually “Visa”, not all-caps.

That's interesting. It was always 'VISA' in the past, when did it become 'Visa'?

No, it seems like it was always “Visa”. See the scanned advertisement https://clickamericana.com/topics/money-work/visa-card-debut....

I'm just talking about the name in text. The logo has always been in all-caps.