My partner reckons the stall is trying to pocket the cash off the books, but I'd like to think not and the lady was simply confused/uneducated of fees.
I am wondering if it is just a case of too many people saying "yep i am paying with EFTPOS" then pushing the CR button ( a lot of people having combined CC/EFTPOS cards )
As discussed the fees on Credit transaction can make it not worth it when under $30, so just easier for the Vendor to say no electronic transactions under $30. Also has the added effect of upselling the customer to a higher spend
That's probably the precise reason's (including up-sell).
But people here seem to jump to the conclusion somthing is sinister - way too fast....