For most commercial applications, the chargers are made available for client use at no charge. The business considers the value of attracting the customer, and having them spend time in a commercial establishment, more than enough to offset the cost of EV charging solution installation and operation.
Having said that, there ARE options to set up billing for commercial EV charging solutions, so that EV drivers are billed for using charging services. This can take many different forms; please see “What sort of billing options are available?”.