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On #1 I assume it’s simply the fact that Visa is big enough and stable/reliable enough that banks would be willing to do the integration to them to get the benefits instead of doing hundreds of bespoke integrations for little apps/services.

The trusted, widespread brand angle does make sense there as a reason for banks to choose to integrate with Visa, agreed.

But does that then imply that users authenticate with their bank via Visa (i.e. Visa becoming an identity provider -- not totally unimaginable given their association with customer-issued cards)? Or instead that banks would implicitly offer this data to Plaid/Visa under their card issuance ToS, without user authentication required?

(I'm not really asking for answers, I don't think we can really know at this point. It just leads to questions like this and I'm curious)

User authentication would be handled somewhere :)

But ya, I bet they're going to push hard on "provide us openid connect" in future contract negotiations to solve the security problem.

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