Credit-card issuers in the USA are a textbook example of a consumer- and retailer-harming monopoly.
That's where they get new clients, and most of the rest of their sales go to loyal repat customers who know them already.
Try to tell them how they could capture a large part of those new customers themselves by investing in their own presence - very little money in comparison - and they start complaining if they have to pay any monthly fee and complaining about card fees to receive payment.
You have to spend money to make money, and any money you spend to get out of the claws of third party platforms is usually money very well spent. But small business owners don't want to hear it.
However, with cash one needs to have / has / has to pay for:
* a more complex register * a person who takes more time to do the transaction * someone who counts the register at the end of the day to ensure it matches * someone who drives to the bank to deposit the money (at random times) * additional insurance * a bank account which probably charges for these cash services
If you don't count time, then cash is better.
And also, in Europe, if you as a business prefer cash, we all know it means that you make X, but you only report X/2.
That said, I expect the cost of taking cash does scale to some degree with how much of it you take. Obviously you still need a cash register, but if only 10-20% of your business is cash, maybe it only needs to be reconciled and emptied out every second or third day? And it's a faster and lower stakes process if there's less in it? Insurance is cheaper as well if the total loss is 1/10 what it would be if every dime was passing through there.
