These two games are GameCredits test games. The company is using real world people to fine tune our API, and get ready to integrate on thousands of games. Those games already exist with their own in game currencies. You therefore would use GameCredits to buy those currencies or in game items. (However you can find coupons for GameCredits by playing, and there are big discounts for paying for GameCredits). However, developers who would like to code in the ability to earn GameCredits will be able to. That is the beauty of our platform.