Apple already had everyone's billing information from iTunes... you could buy things just by typing in your password... That, for the first time, brought very, very easy payment to the modern software world. That, more than anything, is why there is a business for paid apps.
Marco ArmentEmphasizing and rewarding length over quality results in worse writing and more reader abandonment.
Marco ArmentInstapaper wouldn't be of as much value if it weren't for these mobile and e-reader devices. They give you a separate physical context for reading.
Marco Arment