Most civilizations develop their own currencies, and Zwinktopia is no different. ZBucks are the preferred virtual tender used by Zwinky users, and people use them to purchase goods and services around the Zwinktopia virtual world.
All Zwinky users start off with 100 ZBucks, and these funds can be put on a Zcard account. The Zcard is somewhat like a debit card in the real world -- it's used to buy any item in Zwinktopia, along with special premium items that users can get only with the Zcard.
So how do Zwinkies earn ZBucks? Well, there's more than one way. For instance, simply walking around and exploring Zwinktopia is one way to earn ZBucks. For each different place you visit, whether it's a single building or a larger, general area, you can earn one ZBuck, and you can collect up to 30 ZBucks per day. Playing games, however, is where the real cash is found. After finishing a game, you have the option of cashing in your score, which turns your performance into cold, hard ZBucks. The average game generates between 15 and 30 ZBucks for players, and Zwinkies can earn up to 300 ZBucks per day playing games.
Members also get 10 ZBucks for every friend they invite to join Zwinky -- there's a maximum of 10 invitations and 100 ZBucks per month. However, you'll also get an extra 50 ZBucks for every person who actually joins the service -- again, there's a maximum of 10 joins and 500 ZBucks. If members simply want to take the easy path to ZBucks, they can purchase them and add them to their Zcards by using a major credit card or PayPal account.
Zwinky users can use Zbucks to purchase clothing items, which they can acquire at the Zwinchester mall in Zwinktopia by adding clothes to their virtual shopping bags. But there's more to buy with Zbucks than just clothes. Users can also buy food and drinks at The Caf or at Java Jolt. And don't forget that you can also purchase and decorate a dorm room at ZSU. Dorm rooms are particularly expensive -- they'll cost Zwinkies 1,250 ZBucks -- and they're located in the ZSU Quad.