The excuse they'll use, which actually does has some truth to it, is that bathrooms that get used require upkeep like cleaning, TP, water/electricity, etc. The poor widdle businesses need to recoup their losses. But even with that aside, requiring people to pay in order to do something that everyone needs to do can bring in more money. Like if a person needs to go, especially if it's urgent, are they going to grab the nearest product and pay as quickly as they can so they can get to the damn toilet, or are they going to run to the next establishment (or more likely in burgerland, get back in their car and drive to the next establishment) that probably also requires them to pay to piss? On top of all of that, it's a way to discourage unhoused people from existing in the vicinity and "driving away customers."