Next time the topic of bandwidth caps comes up remember this guy. I don't want to knock his project but I think it illustrates a point that unlimited bandwidth and access to services tends to make people less concerned about using bandwidth efficiently.
Nothing. I'm sure he probably would have if forced to. I know from my own (bad) habits I often waste bandwidth just because I can. Common example of this is having a file downloaded to my laptop sitting in my backpack but instead of taking it out, waking it up, mounting the share and copying it I'll just re-download it from the Internet instead because I'm lazy and there's really no downside for me.