Every now and then this will backfire on the business. For instance, what happens if the system goes down?
I was recently in a cashless place that suddenly lost internet access as the cashier(?) was ringing up my food. With no way to charge me I was given my lunch for free and everyone in the line behind me was forced to wait.
The mastercard network was down recently (maestro cards also operate on it), which did really bad things to basically everything that accepted only plastic. Of course you know in the abstract that this full plastic stuff is a bad idea (it's so obvious), but it's very sobering still to see this in practice.
I was recently in a cashless place that suddenly lost internet access as the cashier(?) was ringing up my food. With no way to charge me I was given my lunch for free and everyone in the line behind me was forced to wait.