"I'm not hostile to the notion of people paying for online content. I do so myself. I'm glad people stepped up and paid for Salon. But the value of stuff online is usually tied to how deeply it is woven into the network. So locking your stuff away in order to charge for it means that you are usually making it less valuable at the moment that you are asking people to pay for it. And that's why people so often respond with: "No thanks."in reference to:
"if you have a product that is scarce, you can charge for it more easily. Specialised information, information that people need to earn their livings and can't get elsewhere, and so on. If there are free alternatives, you are not going to get very far, even with an edge in quality."
- Memories of a paywall pioneer | Media | guardian.co.uk (view on Google Sidewiki)