By enlisting in Star Citizen's website (Roberts Space Industries) through this code you'll earn 5,000 UEC directly on registration.
New Star Citizen recruits can sign up to the game by using the referral code. When using the referral code they will earn 5,000 UEC (United Earth Credits) which can be spent on the website for weapons, ship components or decorations for your Hangar.
Most noteworthy is that you don’t have to buy an expensive package. During phase of development you can earn REC ingame to rent equipment and ships to test what suits you best. Just register as a new Star Citizen with the referral code and the 5000 UEC are yours. Fill in the form at the RSI website and redeem your code.
Star Citizen is an upcoming multiplayer space sim currently in pre-alpha, meaning the game has not yet been released. There are modules, however, that have been released and can be played currently after purchasing a pledge package. The expected release date of the game is late 2016. Check out the official trailer for a general idea.
Upon release, Star Citizen will have two major components: Squadron 42 and the Persistent Universe. Squadron 42 is the single-player campaign for the game that allows you to work your way up to gaining citizenship and preparing you for the world. The other aspect is the Persistent Universe, the MMO portion of the game. The PU allows players to explore, interact, mine, fight, and whatever else they want to do in space. The game will be more than a space combat sim, more than a first person shooter and more than an MMO: Star Citizen is the First Person Universe that will allow for unlimited gameplay. Check out the amazing Gamescom 2016 Demo for a more detailed impression. If you want to buy Star Citizen you can use the enlist button above.
The official response of Chris Roberts is no. Even though ships can be purchased to help fund the development of the game right now, ship sales will stop closer to the game's release and will instead only be attainable by purchasing them in-game. Additionally, Cloud Imperium Games (CIG) is really trying to make Star Citizen about player skill rather than based on stats, therefore a player may own a powerful ship but not necessarily know how to fly it particularly well. Players will still be able to purchase UEC when the game launches, though this is more to counter "gold farmers" and there will be a maximum amount that can be purchased.