Here's a helpful hint for those of you who are not receiving the free Doubloons after completing one of the download & install offers you may want to try the following steps:

1. Return to your home screen and try double tapping the home button to bring up the fast switch menu.  

2. Press and hold on the game icon until the icon begins to wiggle, then press the red minus sign in the top left corner to quit the app.  

3. Relaunch and the game should progress to the opening screen and your Doubloons should begin to appear.

In iOS 4 games like Flick Fishing Free support fast-app switching which keeps apps in a suspended state when you exit them so you can continue where you left off on your next launch.  In order for the Doubloons to be awarded you need to remove the game from fast-app switching so that you can get to the initial loading screen.