This use to take the ads away, block updates, ability to remove bloatware and a couple of neat apps to make the FireTablet and ActionTiles experience more fluid.
Personally, I asked Amazon to remove the ads on 3 of mines and they did after this script no longer worked to remove the ads. I also paid Amazon on about 3 more to remove the ads after they refuse to remove them for free on the newer ones.
I also paid for the Pro license of Fully for all of my Tablets. I believe it was a 10 device volume license.
Finally, I have about 5 Fire Tablets that stay on with Alexa hands free available. These also run DAKboard which is cool and can do a Photo Slide Show as the Screen Saver. All the other ones shut off after a given amount of time. I DO NOT want Amazon feeding me their ads when I hit the home button to get to the lock screen! This script, in the beginning, took care of that problem.