I had a random thought last night which I thought I'd share. There is a visceral human reaction to losing something. People never ever want to give up something they feel they already have. This is not a cold logical calculation, even if you give people something which is way more valuable than the thing you're taking away, they hesitate. (This is why FREE is the most powerful word in marketing :)
The idea of accumulating "stuff" must have hit early on in the evolution of humans. Anthropologists tell us we were herders, and [probably] harem-based, and both of these imply possession. Intelligence may have evolved so we could evaluate trades. Anyway however it happened, it is now true; we are materialistic. Any human society which has attempted to deny this has failed, and the human society which is most successful is the United States, which celebrates materialism and features it as a core value. One of the first things that must happen to transform a failed state is some sort of rule of law, including some rights to personal possession.
Losing something doesn't only mean losing an object, it can also mean losing a right, such as freedom. And losing rights provokes even more of a reaction than losing objects. Tell someone they can't do something, especially something they could do yesterday, and you are going to get strong resistance.
The implications of this for businesses are significant, especially those targeting consumers. Any product or service which trades one thing for another is going to have tough sledding compared to a product or service which gives you something for nothing.
Media companies are finding this out the hard way. Consumers do not want products with strings attached. They are used to buying something, and owning it, and having complete freedom to do with it what they want. Any kind of restriction is taking that freedom away, and is going to piss people off. It isn't just that they won't buy the product or service - although they won't - it's that they're actually going to be insulted and angry. Look at the way consumers have reacted to DRM. ("You mean I buy it, but then I can't do what I want with it?")
Consumers don't do a logical calculation and say, okay, I get it, I pay you $X and get Y product with Z strings attached. No. They say, no way, if I give you $X for Y product I expect zero strings attached. Don't take my freedom! I hate losing something!