Microsoft's Bing is their attempt to be relevant in the search market. One of the nice things with them being so far behind Google is they're trying hard to get new users! One thing I love is their rewards program - use Bing, earn points, and get goodies.
One of their rewards is a gift card from Rixty. On their reward site:
Rixty is a universal prepaid card for over 1000 multiplayer & downloadable games, virtual worlds and mobile games. Whether you love the hottest games from Bigpoint, Perfect World and Aeria Games, kids' games like Roblox and WeeWorld, or first-person shooters like CrossFire, Rixty is the only card you need to pay for them all. You can even get downloadable games from top web stores. Rixty – one card, over 1000 sources of fun online.
So, earning 525 points will get you a $5 gift card to Rixty. Presumably, that will result in $5 worth of Zen (500 Zen). Not bad, eh?
If you want to sign up, you can do so here.