As treasurer for a group that maintains four repeaters, let me interject something here.And, ham radio is a pay once thing.
One of the cool things about amateur radio is that you can talk across town, coast to coast, or around the world using absolutely no infrastructure except the stations at either end of the conversation. No cell phone towers, no Internet backbone, no satellites.
The one small exception is repeaters. There are all kinds of amateur radio repeater systems ranging from a standalone 2m repeater that barely covers a county all the way up to massive multi-state linked systems incorporating many individual repeaters on different bands with remote receive sites and backbone links. The one common thread running through all of these repeaters is that it costs money to keep them on the air.
So, when your local repeater group asks for a donation or sends you are reminder to pay your dues, don't neglect them. That $10-20 per year is helping to maintain a valuable communications resource.