Felix Salmon investigates how newspaper paywalls are evolving: In the early days of paywalls, some content was free, while other content you needed to pay for; the meter, in theory, replaced that system with one where the determination as to whether an article was free or not was a function of how many other articles the reader had read, rather than being a function of the content of the article itself. But this is a bit simplistic:  [I]t’s a mistake — at least from a purely financial perspective — to treat all readers equally. Some readers … [Read more...]