Most places using those software solutions are e-commerce only places, and only accept credit cards. This will have pretty much no effect on them, as they should already be taking into account those fees when they set their prices.
The merchants affected by this are those that accept both cash and credit cards for products sold through a given sales channel. Generally, that will be the brick and mortar shops. They'll now be able to advertise the cash price for the item, and tack on a credit card fee at the cash register.
The merchants affected by this are those that accept both cash and credit cards for products sold through a given sales channel. Generally, that will be the brick and mortar shops. They'll now be able to advertise the cash price for the item, and tack on a credit card fee at the cash register.