J. Eddie Smith, IV on the cost of not buying good software:
Good software is virtually free, regardless of its purchase price, because the payback dwarfs the investment. If your time is worth something, you’d be rational to pay hundreds of dollars for applications you use every day.
This is why I don’t hesitate to pay the $4.99 to remove ads from Twitterrific. I use the app probably thirty times a day. Giving the developer five bucks not only gives me a better experience, it’s the best way for me to say thank you.