I built this one awhile ago. Basically, it's a Bounty Hunter license to kill Pirates and receive extra money and exp. I found that it adds a lot to the game and yes, you can buy it for a low amount of money from the first planet shop and then go out and start reaping the benefits. At some point I'll make an icon for it in the shop, right now it just emulates another goodhttp://www.filedropper.com/licensetokill
Any feedback is welcome!