Via Forbes:

People who don’t pay you generally wouldn’t have paid you anyway. We’re delighted when people who can’t afford our books don’t pay us for them, if they go out and do something useful with that information … There’s a bakery in Berkeley that every day dumps a lot of fresh bread into a dumpster behind the store. And there’s a bunch of people who get their bread there. I guarantee you that there are a lot more people who, even if you told them they could, would not do that. A lot of sources of free content are like going rooting through the dumpster.