With a Web and iPhone app, I try to find new and tiny ways to delight my customers. They may not notice, but it helps drive goodwill and makes your product remarkable.

One reason I love the Kindle, more so than the iPad, is that on the Kindle you can't do anything else but read. It's the best, because it does the least. It doesn't even show a clock.

Instapaper does support paywall sites. I have a list of them, that when someone saves something it sends a copy of the page as they are viewing it only to them. If you subscribe to a paid site, you can save the content. I'm not really touching the money.

I started out from a pretty modest background, so I always had a pretty good sense of money. I always had to work for my money, save my own money, I always bought my own stuff with my money... trying not to waste money unnecessarily.

I've worked with many large and small publishers, and nearly all of them love the value that Instapaper provides to their readers.

Instapaper 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.

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?