Even if there were only as many nodes as there are countries in the world, that would make a more open payment network than the credit card systems. There are

Even if there were only as many nodes as there are countries in the world, that would make a more open payment network than the credit card systems. There are 195 countries in the world. And a user could pay via any of those 195 nodes. When you accept a certain credit card type (Visa, Mastercard etc) only users who are customers of that company can pay you.