Customers may not flee, but: 1. Customers in e.g. the EU may push their reps to "do something" about two US companies controlling all e-commerce. 2. Customers

Customers may not flee, but: 1. Customers in e.g. the EU may push their reps to "do something" about two US companies controlling all e-commerce. 2. Customers frustrated that Mastercard have gone on the record as refusing to block payments to terrorist-supporting orgs while refusing to process payments to look at titties may pressure regulators to start having a much closer look at Mastercard's money flows. Both of those seem like meaningful concerns.