>but I'm extremely skeptical of the notion that people don't realize they're buying something illegal when they're paying a small percentage of what the services themselves would cost.

Why? There's lots of cases where there's much-cheaper alternatives. I have a mobile phone plan that costs a small fraction of what most of my coworkers pay, because I didn't get a full-service unlimited plan with a subsidized new-every-2-years phone, for instance. Is my phone company hacking into the other company's system to give me service? Who knows, but I trust the government regulators and judicial system enough to assume this isn't happening, or else the company they're riding on the back of would have the service stopped. In reality, low-cost mobile services like this contract with the big carriers to use their spare capacity, and the service is basically 2nd-class too.

It's not a consumer's job to know how businesses operate internally or if they're doing something illegal.