I needed it for my next video to simulate fuel sloshing around in a carburettor. It's not cheap, it cost 250 dollars, which is exactly how much you have all pledged to date. So, whenever you see animations with realistic looking physics or mechanical joints, know that you made that possible.
Thanks again everyone!
Here's a quick intro to see what the plugin is capable of: https://www.youtube.com/watch?v=DkSeWGv_E48