You have a point about the infrastructure. But the devices themselves aren't Apple's devices, they are owned by Apple customers. I'd bet most of these Apple cus

You have a point about the infrastructure. But the devices themselves aren't Apple's devices, they are owned by Apple customers. I'd bet most of these Apple customers would be fine with you "using" their devices for free to locate your stuff, as long as you don't charge them either when they use your devices to locate their stuff.