Processing credit cards was never free. Whatever it was, we were almost certainly paying it before.
The fees were just going to a different place.
Anywhere from 3% to 7%.
Merchants usually have to pay a set amount for each transaction as well as a percentage of the overall transaction. On top of that there is usually a monthly maintenance fee they must pay.
There is a reason why Target gives 5% off for using their Target credit or debit card to pay.
This will make cents (get it) if the system ultimately cuts out Visa and MasterCard allowing merchants to essentially directly debit your bank account.