I imagine attention-based pricing, in which prices of information commodities are inversely adjusted to the cognitive investment of consuming them. All the candy for the human brain — haiku, ringtones, bumper stickers — would be priced like the luxuries that they are. Things requiring longer attention spans would be cheaper — they might even be free, and the higher fixed costs of producing them would be covered by the higher sales of the short attention span products. Single TV episodes would be more expensive to purchase than whole seasons, in the same way that a six-pack of Oreos at the gas station is more expensive, per cookie, than a whole tray at the grocery store.
Michael Erard : A Short Manifesto on the Future of Attention
via Design Observer

