For reasons unknown to me, the local property oligopoly accepts debit/credit rent payments only through an outsourced web service which charges $50 per payment. Perhaps they've convinced the property owners that they have a patent on paying rent online or something. Maybe there's some sort of risk involved. Maybe there's some sort of arrangement with credit card companies to discourage people from earning reward points on their rent every month.

My bank's website doesn't list the company as one that it knows how to pay bills for, and wants you to send them a copy of the physical bill to get it added (there are no "bills" for the rent, so nothing to send). A direct transfer might be possible, but they don't seem to be advertising their account number.