If something seems too good to be true, it probably is. And doubly so when it comes to getting to name big things. From Popular Science:
Remember last week when PopSci told you about a "people’s choice" contest to name the planet orbiting the Alpha Centauri star system? And the International Astronomical Union had cried foul, saying the paid contest had no bearing on the names? Well, it’s not really that simple. You can call a star or a planet whatever you want, and even pay to nominate your favorite; it just might not matter to anyone else.