The thing is, even if MasterCard excluded Apple Card from the data they sell, very few merchants send transactions directly to MasterCard. There's usually a mer

The thing is, even if MasterCard excluded Apple Card from the data they sell, very few merchants send transactions directly to MasterCard. There's usually a merchant acquirer involved, and that acquirer might proxy transactions through Visa rather than integrating with the other networks directly. In that case the merchant, the acquirer, Visa, MasterCard and Goldman Sachs would all see the transaction data. Plus there are normally other companies involved when a transaction is settled later, like First Data.