Writing novels is hard, and requires vast, unbroken slabs of time. Four quiet hours is a resource that I can put to good use. Two slabs of time, each two hours long, might add up to the same four hours, but are not nearly as productive as an unbroken four. If I know that I am going to be interrupted, I can’t concentrate, and if I suspect that I... See more
My general theory of social apps is that they compete on the basis of their network structures, rather than their content formats. The network structure—who sees what—is usually the main driver of value.