I'm currently at my parents' house between semesters of college, and if I want to connect to the internet on my XBox (whether it be for downloading songs or whatever), I have to bring a 50-foot ethernet cable across the living room, which nobody likes to stumble over. And even then, I can't do it during work hours without bogging down the internet that people use for work. So I can really only connect for short periods of time, sporadically.
I would believe that my situation is rare or unique if it wasn't so similar to my experiences so far in life.
In college, I could only connect to the internet to download songs every weekend by bringing my XBox over to my friends' apartment (ours didn't have ethernet, and the XBox didn't support our WiFi)
At the house I lived at in high school, I had to either plug my internet into my XBox or the router, so I could only use it when nobody in the house needed the internet.
Surely limited internet use is not an unheard-of thing. I've had several unique situations that have called for it, and I'm obviously not the only one here with that situation.