They (Visa) can't see much aside from which merchant, how much and when you've paid. That's still pretty powerful metadata, but in most sane legal jurisdictions

They (Visa) can't see much aside from which merchant, how much and when you've paid. That's still pretty powerful metadata, but in most sane legal jurisdictions with decent PII protection statutes, they can't willy nilly go link that to your shopping receipt and break down your purchase to line items.