Like Gruber says:
Long story short: If you’re a subscriber to either Tweetbot or Twitterrific, you can help them out with three simple steps:
- Reinstall the app if you’ve already deleted it; otherwise, make sure you’re running the latest version.
- Tap the “I Don’t Need a Refund” button.
- Feel good and go buy yourself a treat, knowing you helped the good folks at a small company whose work you’ve appreciated (and will continue to).