The operative difference between buying cups of coffee and paid apps is actually this:
If you try to spend $50 on cups of coffee you'll quickly become twitchy and have to stop, but if you keep pressing the Buy button in the app store you can easily get the thing done.
If you try to spend $50 on cups of coffee you'll quickly become twitchy and have to stop, but if you keep pressing the Buy button in the app store you can easily get the thing done.