[He's only been playing ViViD to earn enough money to save up for rent; it's less humiliating than the jobs he was offered, and while some other aspects of winning are good, he's obviously not overly enthusiastic about them.]

The usual game center prizes, trinkets, worthless little toys. If you earn a huge number of points, you can even trade them in for certain items from your world. I haven't tried it myself, so I don't know how well it works.