My local electricity provider does not advertise how to contact them for service.
They assume that if you want power you will “get in touch.” It’s not that they intentionally hide their contact information, they just don’t actively engage the community with the information.
The temptation that comes with offering a product or service that is extremely valuable is that you begin to expect people to come and find you.
When I lived in Cincinnati, I patroned a pizza company who always advertised their phone number in clever ways. The number was on all their print media – napkins, pizza boxes, flyers, billboards. Their commercials rehearsed the one number to call for pizza no matter where you lived in the city. They even put the phone number in their Twitter name.
The difference between the pizza company and the power company is the power company provides something so valuable they assume you will find them when you need them.