Even when you disregard the fact that most libraries that provide out of state services for a cost, they still benefit from this kind of usage. Stats are used for everything in libraries when justifying cost vs. use when answering to the body of people that fund the library. More use means costs are justified. This is also why a lot of academic libraries also provide public access even though the public doesn't necessarily fund the libraries of universities and colleges. Use your libraries, they are there to be used by you!