The reason is that the owner bought them from a random company, they installed it and do have a service contract - the problem is that the service queues are measured in weeks and spare parts are scarce.
The same thing is with chargers on the parking lots of some chain stores. Corporate has mandated that there has to be X charging spots - enter /r/maliciouscompliance - ok boss, here's the charger. Does it work? No. Do they care? No. Does corporate actually care? No, they can quote numbers of installed charging stations in their quarterly reports.
Meanwhile bigger operators standardise on one station provider, have their own trained staff and a stockpile of common spare parts. A few even frequent the local EV driver FB groups and interact with their customer base there.
Tesla on the other hand knows exactly what's happening on their Superchargers and share that data with their vehicles.