I don't even like being quoted in a press release.

Attention to detail can't be (and never is) added later. It's an entire development philosophy, methodology, and culture.

I don't need every customer. I'm primarily in the business of selling a product for money. How much effort do I really want to devote to satisfying people who are unable or extremely unlikely to pay for anything?

Charge for something and make more than you spend.

With Instapaper, I can take a few months off. I can't stop publishing 'The Magazine' for two months and work on something else.

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.

Instapaper is much bigger today than I could have predicted in 2008, and it has simply grown far beyond what one person can do. To really shine, it needs a full-time staff of at least a few people.